diff --git a/phpgwapi/inc/class.egw_framework.inc.php b/phpgwapi/inc/class.egw_framework.inc.php
index d927a13420..419ae3d7bb 100644
--- a/phpgwapi/inc/class.egw_framework.inc.php
+++ b/phpgwapi/inc/class.egw_framework.inc.php
@@ -89,6 +89,7 @@ abstract class egw_framework
 	public static function init_static()
 	{
 		self::$js_include_mgr = new egw_include_mgr(array(
+			'/phpgwapi/js/labjs/LAB.src.js',
 			// allways load jquery (not -ui) and egw_json first
 			'/phpgwapi/js/jquery/jquery.js',
 			'/phpgwapi/js/./egw_json.js',
@@ -1302,6 +1303,14 @@ abstract class egw_framework
 		$start = '<script type="text/javascript" src="'. $GLOBALS['egw_info']['server']['webserver_url'];
 		$end = '">'."</script>\n";
 		return "\n".$start.implode($end.$start, $to_include).$end;
+
+		// using LABjs to load all javascript would require all other script-tags to run in wait() of queue!
+		/*return "\n".$start.'/phpgwapi/js/labjs/LAB.src.js'.$end."\n".
+			'<script type="text/javascript">
+$LAB.setOptions({AlwaysPreserveOrder:true,BasePath:"'.$GLOBALS['egw_info']['server']['webserver_url'].'/"}).script(
+'.json_encode(array_map(function($str){return substr($str,1);}, $to_include, array(1))).').wait();
+</script>
+';*/
 	}
 
 	/**
diff --git a/phpgwapi/js/jsapi/egw_files.js b/phpgwapi/js/jsapi/egw_files.js
index fff8d1ba21..0a93f9e5f0 100644
--- a/phpgwapi/js/jsapi/egw_files.js
+++ b/phpgwapi/js/jsapi/egw_files.js
@@ -43,223 +43,41 @@ egw.extend('files', egw.MODULE_WND_LOCAL, function(_app, _wnd) {
 		return _src.replace(/\?[0-9]+&?/, '?').replace(/\?$/, '');
 	}
 
-	/**
-	 * Add file to list of loaded files
-	 * 
-	 * @param src url of file
-	 * @param dom optional dom node to trac loading status of javascript files
-	 */
-	function addFile(src, dom)
-	{
-		if (src)
-		{
-			files[removeTS(src)] = dom || true;
-		}
-	}
-	
-	/**
-	 * Check if a source file is already loaded or loading
-	 * 
-	 * @param _src url of file (already run throught removeTS!)
-	 * @return false: not loaded, true: loaded or "loading"
-	 */
-	function isLoaded(_src)
-	{
-		switch (typeof files[_src])
-		{
-			case 'undefined':
-				return false;
-			case 'boolean':
-				return files[_src];
-			default:
-				return files[_src].readyState == 'complete' || files[_src].readyState == 'loaded';
-		}
-		return "loading";
-	}
-	
-	/**
-	 * object with array of callbacks or contexts by source/url
-	 */
-	var callbacks = {};
-	var contexts = {};
-	
-	/**
-	 * Attach onLoad callback to given js source
-	 * 
-	 * @param _src url of file (already run throught removeTS!)
-	 * @param _callback
-	 * @param _context
-	 * @return true if callback got attached, false if it was run directly
-	 */
-	function attachCallback(_src, _callback, _context)
-	{
-		if (typeof _callback === 'undefined') return;
-
-		switch (typeof files[_src])
-		{
-			case 'undefined':
-			case 'boolean':
-				_callback.call(_context);
-				return false;
-		}
-		
-		if (typeof callbacks[_src] === 'undefined')
-		{
-			callbacks[_src] = []; 
-			contexts[_src] = [];
-			callbacks[_src].push(_callback);
-			contexts[_src].push(_context);
-			
-			var scriptnode = files[_src];
-			
-			// Setup the 'onload' handler for FF, Opera, Chrome
-			scriptnode.onload = function(e) {
-				egw.debug('info', 'Retrieved JS file "%s" from server', _src);
-				runCallbacks.call(this, _src);
-			};
-
-			// IE
-			if (typeof scriptnode.readyState != 'undefined')
-			{
-				if (scriptnode.readyState != 'complete' &&
-					scriptnode.readyState != 'loaded')
-				{
-					scriptnode.onreadystatechange = function() {
-						var node = _wnd.event.srcElement;
-						if (node.readyState == 'complete' || node.readyState == 'loaded')
-						{
-							egw.debug('info', 'Retrieved JS file "%s" from server', _src);
-							runCallbacks.call(this, _src);
-						}
-					};
-				}
-				else
-				{
-					runCallbacks.call(this, _src);
-					return false;
-				}
-			}
-		}
-		else
-		{
-			callbacks[_src].push(_callback);
-			contexts[_src].push(_context);
-		}
-		return true;
-	}
-	
-	/**
-	 * Run all callbacks of a given source
-	 * 
-	 * @param _src url of file (already run throught removeTS!)
-	 */
-	function runCallbacks(_src)
-	{
-		if (typeof callbacks[_src] === 'undefined') return;
-		
-		egw.debug('info', 'Running %d callbacks for JS file "%s"', callbacks[_src].length, _src);
-
-		for(var i = 0; i < callbacks[_src].length; i++)
-		{
-			callbacks[_src][i].call(contexts[_src][i]);
-		}
-		delete callbacks[_src];
-		delete contexts[_src];
-	}
-
-	/**
-	 * Gather all already loaded JavaScript and CSS files on document load.
-	 */
-	// Iterate over the script tags
-	var scripts = _wnd.document.getElementsByTagName('script');
-	for (var i = 0; i < scripts.length; i++)
-	{
-		addFile(scripts[i].getAttribute('src'), scripts[i]);
-	}
-
-	// Iterate over the link tags
-	var links = _wnd.document.getElementsByTagName('link');
-	for (var i = 0; i < links.length; i++)
-	{
-		addFile(links[i].getAttribute('href'));
-	}
-
-	/**
-	 * Include a single javascript file and call given callback once it's done
-	 * 
-	 * If file is already loaded, _callback gets called imediatly
-	 * 
-	 * @param _jsFile url of file
-	 * @param _callback
-	 * @param _context for callback
-	 */
-	function includeJSFile(_jsFile, _callback, _context)
-	{
-		var _src = removeTS(_jsFile);
-		var alreadyLoaded = isLoaded(_src);
-
-		if (alreadyLoaded === false)
-		{
-			// Create the script node which contains the new file
-			var scriptnode = _wnd.document.createElement('script');
-			scriptnode.type = "text/javascript";
-			scriptnode.src = _jsFile;
-			scriptnode._originalSrc = _jsFile;
-			
-			files[_src] = scriptnode;
-
-			// Append the newly create script node to the head
-			var head = _wnd.document.getElementsByTagName('head')[0];
-			head.appendChild(scriptnode);
-
-			// Request the given javascript file
-			egw.debug('info', 'Requested JS file "%s" from server', _jsFile);
-		}
-		else if (alreadyLoaded === true)
-		{
-			egw.debug('info', 'JS file "%s" already loaded', _jsFile);
-		}
-		else
-		{
-			egw.debug('info', 'JS file "%s" currently loading', _jsFile);
-		}
-
-		// attach (or just run) callback
-		attachCallback(_src, _callback, _context);
-	}
-
 	return {
 		includeJS: function(_jsFiles, _callback, _context, _prefix) {
-			// Also allow including a single javascript file
-			if (typeof _jsFiles === 'string')
-			{
-				_jsFiles = [_jsFiles];
-			}
 			if (typeof _prefix === 'undefined')
 			{
 				_prefix = '';
 			}
-
-			var loaded = 0;
-
-			// Include all given JS files, if all are successfully loaded, call
-			// the context function
-			for (var i = 0; i < _jsFiles.length; i++)
+			// LABjs uses prefix only if url is not absolute, so removing leading / if necessary and add it to prefix
+			if (_prefix)
 			{
-				includeJSFile.call(this, _prefix+_jsFiles[i], function(_file) {
-					loaded++;
-					if (loaded == _jsFiles.length && _callback) {
-						_callback.call(_context);
-					}
-				});
+				// Also allow including a single javascript file
+				if (typeof _jsFiles === 'string')
+				{
+					_jsFiles = [_jsFiles];
+				}
+				for(var i=0; i < _jsFiles.length; ++i)
+				{
+					if (_jsFiles[i].charAt(0) == '/') _jsFiles[i] = _jsFiles[i].substr(1);
+				}
+				if (_prefix.charAt(_prefix.length-1) != '/')
+				{
+					_prefix += '/';
+				}
 			}
+			// setting AlwaysPreserverOrder: true, 'til we have some other means of ensuring dependency resolution
+			$LAB.setOptions({AlwaysPreserveOrder:true,BasePath:_prefix}).script(_jsFiles).wait(function(){
+				_callback.call(_context);
+			});
 		},
 
 		includeCSS: function(_cssFile) {
 			//Check whether the requested file has already been included
-			if (typeof files[_cssFile] === 'undefined')
+			var file = removeTS(_cssFile);
+			if (typeof files[file] === 'undefined')
 			{
-				files[_cssFile] = true;
+				files[file] = true;
 
 				// Create the node which is used to include the css fiel
 				var cssnode = _wnd.document.createElement('link');
diff --git a/phpgwapi/js/labjs/LAB-debug.min.js b/phpgwapi/js/labjs/LAB-debug.min.js
new file mode 100755
index 0000000000..99e7b142fe
--- /dev/null
+++ b/phpgwapi/js/labjs/LAB-debug.min.js
@@ -0,0 +1,5 @@
+/*! LAB.js (LABjs :: Loading And Blocking JavaScript)
+    v2.0.3 (c) Kyle Simpson
+    MIT License
+*/
+(function(j){var N=j.$LAB,A="UseLocalXHR",B="AlwaysPreserveOrder",w="AllowDuplicates",C="CacheBust",l="Debug",D="BasePath",E=/^[^?#]*\//.exec(location.href)[0],F=/^\w+\:\/\/\/?[^\/]+/.exec(E)[0],i=document.head||document.getElementsByTagName("head"),O=(j.opera&&Object.prototype.toString.call(j.opera)=="[object Opera]")||("MozAppearance"in document.documentElement.style),m=function(){},G=m,s=document.createElement("script"),H=typeof s.preload=="boolean",t=H||(s.readyState&&s.readyState=="uninitialized"),I=!t&&s.async===true,P=!t&&!I&&!O;if(j.console&&j.console.log){if(!j.console.error)j.console.error=j.console.log;m=function(a){j.console.log(a)};G=function(a,c){j.console.error(a,c)}}function J(a){return Object.prototype.toString.call(a)=="[object Function]"}function K(a){return Object.prototype.toString.call(a)=="[object Array]"}function Q(a,c){var b=/^\w+\:\/\//;if(/^\/\/\/?/.test(a)){a=location.protocol+a}else if(!b.test(a)&&a.charAt(0)!="/"){a=(c||"")+a}return 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g(){if(d!=null){d=null;L(b)}}if(r[c.src].finished)return;if(!a[w])r[c.src].finished=true;d=b.elem||document.createElement("script");if(c.type)d.type=c.type;if(c.charset)d.charset=c.charset;v(d,b,"finished",g);if(b.elem){b.elem=null}else if(b.text){d.onload=d.onreadystatechange=null;d.text=b.text}else{d.src=c.real_src}i.insertBefore(d,i.firstChild);if(b.text){g()}}function V(c,b,d,g){var e,f,h=function(){b.ready_cb(b,function(){U(c,b,e)})},k=function(){b.finished_cb(b,d)};b.src=Q(b.src,c[D]);b.real_src=b.src+(c[C]?((/\?.*$/.test(b.src)?"&_":"?_")+~~(Math.random()*1E9)+"="):"");if(!r[b.src])r[b.src]={items:[],finished:false};f=r[b.src].items;if(c[w]||f.length==0){e=f[f.length]={ready:false,finished:false,ready_listeners:[h],finished_listeners:[k]};S(c,b,e,((g)?function(){e.ready=true;for(var a=0;a<e.ready_listeners.length;a++){e.ready_listeners[a]()}e.ready_listeners=[]}:function(){L(e)}),g)}else{e=f[0];if(e.finished){k()}else{e.finished_listeners.push(k)}}}function x(){var e,f=u(o,{}),h=[],k=0,y=false,n;function W(a,c){if(f[l])m("script preload finished: "+a.real_src);a.ready=true;a.exec_trigger=c;z()}function X(a,c){if(f[l])m("script execution finished: "+a.real_src);a.ready=a.finished=true;a.exec_trigger=null;for(var b=0;b<c.scripts.length;b++){if(!c.scripts[b].finished)return}c.finished=true;z()}function z(){while(k<h.length){if(J(h[k])){if(f[l])m("$LAB.wait() executing: "+h[k]);try{h[k++]()}catch(err){if(f[l])G("$LAB.wait() error caught: ",err)}continue}else if(!h[k].finished){if(R(h[k]))continue;break}k++}if(k==h.length){y=false;n=false}}function Y(){if(!n||!n.scripts){h.push(n={scripts:[],finished:true})}}e={script:function(){for(var g=0;g<arguments.length;g++){(function(a,c){var b;if(!K(a)){c=[a]}for(var d=0;d<c.length;d++){Y();a=c[d];if(J(a))a=a();if(!a)continue;if(K(a)){b=[].slice.call(a);b.unshift(d,1);[].splice.apply(c,b);d--;continue}if(typeof 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p},sandbox:function(){return M()}};return p}j.$LAB=M();(function(a,c,b){if(document.readyState==null&&document[a]){document.readyState="loading";document[a](c,b=function(){document.removeEventListener(c,b,false);document.readyState="complete"},false)}})("addEventListener","DOMContentLoaded")})(this);
\ No newline at end of file
diff --git a/phpgwapi/js/labjs/LAB.js b/phpgwapi/js/labjs/LAB.js
new file mode 100755
index 0000000000..e710dfea28
--- /dev/null
+++ b/phpgwapi/js/labjs/LAB.js
@@ -0,0 +1,5 @@
+/*! LAB.js (LABjs :: Loading And Blocking JavaScript)
+    v2.0.3 (c) Kyle Simpson
+    MIT License
+*/
+(function(o){var K=o.$LAB,y="UseLocalXHR",z="AlwaysPreserveOrder",u="AllowDuplicates",A="CacheBust",B="BasePath",C=/^[^?#]*\//.exec(location.href)[0],D=/^\w+\:\/\/\/?[^\/]+/.exec(C)[0],i=document.head||document.getElementsByTagName("head"),L=(o.opera&&Object.prototype.toString.call(o.opera)=="[object Opera]")||("MozAppearance"in document.documentElement.style),q=document.createElement("script"),E=typeof q.preload=="boolean",r=E||(q.readyState&&q.readyState=="uninitialized"),F=!r&&q.async===true,M=!r&&!F&&!L;function G(a){return Object.prototype.toString.call(a)=="[object Function]"}function H(a){return Object.prototype.toString.call(a)=="[object Array]"}function N(a,c){var b=/^\w+\:\/\//;if(/^\/\/\/?/.test(a)){a=location.protocol+a}else if(!b.test(a)&&a.charAt(0)!="/"){a=(c||"")+a}return b.test(a)?a:((a.charAt(0)=="/"?D:C)+a)}function s(a,c){for(var b in a){if(a.hasOwnProperty(b)){c[b]=a[b]}}return c}function O(a){var c=false;for(var 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\ No newline at end of file
diff --git a/phpgwapi/js/labjs/LAB.min.js b/phpgwapi/js/labjs/LAB.min.js
new file mode 100755
index 0000000000..e710dfea28
--- /dev/null
+++ b/phpgwapi/js/labjs/LAB.min.js
@@ -0,0 +1,5 @@
+/*! LAB.js (LABjs :: Loading And Blocking JavaScript)
+    v2.0.3 (c) Kyle Simpson
+    MIT License
+*/
+(function(o){var K=o.$LAB,y="UseLocalXHR",z="AlwaysPreserveOrder",u="AllowDuplicates",A="CacheBust",B="BasePath",C=/^[^?#]*\//.exec(location.href)[0],D=/^\w+\:\/\/\/?[^\/]+/.exec(C)[0],i=document.head||document.getElementsByTagName("head"),L=(o.opera&&Object.prototype.toString.call(o.opera)=="[object Opera]")||("MozAppearance"in document.documentElement.style),q=document.createElement("script"),E=typeof q.preload=="boolean",r=E||(q.readyState&&q.readyState=="uninitialized"),F=!r&&q.async===true,M=!r&&!F&&!L;function G(a){return Object.prototype.toString.call(a)=="[object Function]"}function H(a){return Object.prototype.toString.call(a)=="[object Array]"}function N(a,c){var b=/^\w+\:\/\//;if(/^\/\/\/?/.test(a)){a=location.protocol+a}else if(!b.test(a)&&a.charAt(0)!="/"){a=(c||"")+a}return b.test(a)?a:((a.charAt(0)=="/"?D:C)+a)}function s(a,c){for(var b in a){if(a.hasOwnProperty(b)){c[b]=a[b]}}return c}function O(a){var c=false;for(var b=0;b<a.scripts.length;b++){if(a.scripts[b].ready&&a.scripts[b].exec_trigger){c=true;a.scripts[b].exec_trigger();a.scripts[b].exec_trigger=null}}return c}function t(a,c,b,d){a.onload=a.onreadystatechange=function(){if((a.readyState&&a.readyState!="complete"&&a.readyState!="loaded")||c[b])return;a.onload=a.onreadystatechange=null;d()}}function I(a){a.ready=a.finished=true;for(var c=0;c<a.finished_listeners.length;c++){a.finished_listeners[c]()}a.ready_listeners=[];a.finished_listeners=[]}function P(d,f,e,g,h){setTimeout(function(){var a,c=f.real_src,b;if("item"in i){if(!i[0]){setTimeout(arguments.callee,25);return}i=i[0]}a=document.createElement("script");if(f.type)a.type=f.type;if(f.charset)a.charset=f.charset;if(h){if(r){e.elem=a;if(E){a.preload=true;a.onpreload=g}else{a.onreadystatechange=function(){if(a.readyState=="loaded")g()}}a.src=c}else if(h&&c.indexOf(D)==0&&d[y]){b=new XMLHttpRequest();b.onreadystatechange=function(){if(b.readyState==4){b.onreadystatechange=function(){};e.text=b.responseText+"\n//@ sourceURL="+c;g()}};b.open("GET",c);b.send()}else{a.type="text/cache-script";t(a,e,"ready",function(){i.removeChild(a);g()});a.src=c;i.insertBefore(a,i.firstChild)}}else if(F){a.async=false;t(a,e,"finished",g);a.src=c;i.insertBefore(a,i.firstChild)}else{t(a,e,"finished",g);a.src=c;i.insertBefore(a,i.firstChild)}},0)}function J(){var l={},Q=r||M,n=[],p={},m;l[y]=true;l[z]=false;l[u]=false;l[A]=false;l[B]="";function R(a,c,b){var d;function f(){if(d!=null){d=null;I(b)}}if(p[c.src].finished)return;if(!a[u])p[c.src].finished=true;d=b.elem||document.createElement("script");if(c.type)d.type=c.type;if(c.charset)d.charset=c.charset;t(d,b,"finished",f);if(b.elem){b.elem=null}else if(b.text){d.onload=d.onreadystatechange=null;d.text=b.text}else{d.src=c.real_src}i.insertBefore(d,i.firstChild);if(b.text){f()}}function S(c,b,d,f){var e,g,h=function(){b.ready_cb(b,function(){R(c,b,e)})},j=function(){b.finished_cb(b,d)};b.src=N(b.src,c[B]);b.real_src=b.src+(c[A]?((/\?.*$/.test(b.src)?"&_":"?_")+~~(Math.random()*1E9)+"="):"");if(!p[b.src])p[b.src]={items:[],finished:false};g=p[b.src].items;if(c[u]||g.length==0){e=g[g.length]={ready:false,finished:false,ready_listeners:[h],finished_listeners:[j]};P(c,b,e,((f)?function(){e.ready=true;for(var a=0;a<e.ready_listeners.length;a++){e.ready_listeners[a]()}e.ready_listeners=[]}:function(){I(e)}),f)}else{e=g[0];if(e.finished){j()}else{e.finished_listeners.push(j)}}}function v(){var e,g=s(l,{}),h=[],j=0,w=false,k;function T(a,c){a.ready=true;a.exec_trigger=c;x()}function U(a,c){a.ready=a.finished=true;a.exec_trigger=null;for(var b=0;b<c.scripts.length;b++){if(!c.scripts[b].finished)return}c.finished=true;x()}function x(){while(j<h.length){if(G(h[j])){try{h[j++]()}catch(err){}continue}else if(!h[j].finished){if(O(h[j]))continue;break}j++}if(j==h.length){w=false;k=false}}function V(){if(!k||!k.scripts){h.push(k={scripts:[],finished:true})}}e={script:function(){for(var f=0;f<arguments.length;f++){(function(a,c){var b;if(!H(a)){c=[a]}for(var d=0;d<c.length;d++){V();a=c[d];if(G(a))a=a();if(!a)continue;if(H(a)){b=[].slice.call(a);b.unshift(d,1);[].splice.apply(c,b);d--;continue}if(typeof a=="string")a={src:a};a=s(a,{ready:false,ready_cb:T,finished:false,finished_cb:U});k.finished=false;k.scripts.push(a);S(g,a,k,(Q&&w));w=true;if(g[z])e.wait()}})(arguments[f],arguments[f])}return e},wait:function(){if(arguments.length>0){for(var a=0;a<arguments.length;a++){h.push(arguments[a])}k=h[h.length-1]}else k=false;x();return e}};return{script:e.script,wait:e.wait,setOptions:function(a){s(a,g);return e}}}m={setGlobalDefaults:function(a){s(a,l);return m},setOptions:function(){return v().setOptions.apply(null,arguments)},script:function(){return v().script.apply(null,arguments)},wait:function(){return v().wait.apply(null,arguments)},queueScript:function(){n[n.length]={type:"script",args:[].slice.call(arguments)};return m},queueWait:function(){n[n.length]={type:"wait",args:[].slice.call(arguments)};return m},runQueue:function(){var a=m,c=n.length,b=c,d;for(;--b>=0;){d=n.shift();a=a[d.type].apply(null,d.args)}return a},noConflict:function(){o.$LAB=K;return m},sandbox:function(){return J()}};return m}o.$LAB=J();(function(a,c,b){if(document.readyState==null&&document[a]){document.readyState="loading";document[a](c,b=function(){document.removeEventListener(c,b,false);document.readyState="complete"},false)}})("addEventListener","DOMContentLoaded")})(this);
\ No newline at end of file
diff --git a/phpgwapi/js/labjs/LAB.src.js b/phpgwapi/js/labjs/LAB.src.js
new file mode 100755
index 0000000000..99807cd222
--- /dev/null
+++ b/phpgwapi/js/labjs/LAB.src.js
@@ -0,0 +1,514 @@
+/*! LAB.js (LABjs :: Loading And Blocking JavaScript)
+    v2.0.3 (c) Kyle Simpson
+    MIT License
+*/
+
+(function(global){
+	var _$LAB = global.$LAB,
+	
+		// constants for the valid keys of the options object
+		_UseLocalXHR = "UseLocalXHR",
+		_AlwaysPreserveOrder = "AlwaysPreserveOrder",
+		_AllowDuplicates = "AllowDuplicates",
+		_CacheBust = "CacheBust",
+		/*!START_DEBUG*/_Debug = "Debug",/*!END_DEBUG*/
+		_BasePath = "BasePath",
+		
+		// stateless variables used across all $LAB instances
+		root_page = /^[^?#]*\//.exec(location.href)[0],
+		root_domain = /^\w+\:\/\/\/?[^\/]+/.exec(root_page)[0],
+		append_to = document.head || document.getElementsByTagName("head"),
+		
+		// inferences... ick, but still necessary
+		opera_or_gecko = (global.opera && Object.prototype.toString.call(global.opera) == "[object Opera]") || ("MozAppearance" in document.documentElement.style),
+
+/*!START_DEBUG*/
+		// console.log() and console.error() wrappers
+		log_msg = function(){}, 
+		log_error = log_msg,
+/*!END_DEBUG*/
+		
+		// feature sniffs (yay!)
+		test_script_elem = document.createElement("script"),
+		explicit_preloading = typeof test_script_elem.preload == "boolean", // http://wiki.whatwg.org/wiki/Script_Execution_Control#Proposal_1_.28Nicholas_Zakas.29
+		real_preloading = explicit_preloading || (test_script_elem.readyState && test_script_elem.readyState == "uninitialized"), // will a script preload with `src` set before DOM append?
+		script_ordered_async = !real_preloading && test_script_elem.async === true, // http://wiki.whatwg.org/wiki/Dynamic_Script_Execution_Order
+		
+		// XHR preloading (same-domain) and cache-preloading (remote-domain) are the fallbacks (for some browsers)
+		xhr_or_cache_preloading = !real_preloading && !script_ordered_async && !opera_or_gecko
+	;
+
+/*!START_DEBUG*/
+	// define console wrapper functions if applicable
+	if (global.console && global.console.log) {
+		if (!global.console.error) global.console.error = global.console.log;
+		log_msg = function(msg) { global.console.log(msg); };
+		log_error = function(msg,err) { global.console.error(msg,err); };
+	}
+/*!END_DEBUG*/
+
+	// test for function
+	function is_func(func) { return Object.prototype.toString.call(func) == "[object Function]"; }
+
+	// test for array
+	function is_array(arr) { return Object.prototype.toString.call(arr) == "[object Array]"; }
+
+	// make script URL absolute/canonical
+	function canonical_uri(src,base_path) {
+		var absolute_regex = /^\w+\:\/\//;
+		
+		// is `src` is protocol-relative (begins with // or ///), prepend protocol
+		if (/^\/\/\/?/.test(src)) {
+			src = location.protocol + src;
+		}
+		// is `src` page-relative? (not an absolute URL, and not a domain-relative path, beginning with /)
+		else if (!absolute_regex.test(src) && src.charAt(0) != "/") {
+			// prepend `base_path`, if any
+			src = (base_path || "") + src;
+		}
+		// make sure to return `src` as absolute
+		return absolute_regex.test(src) ? src : ((src.charAt(0) == "/" ? root_domain : root_page) + src);
+	}
+
+	// merge `source` into `target`
+	function merge_objs(source,target) {
+		for (var k in source) { if (source.hasOwnProperty(k)) {
+			target[k] = source[k]; // TODO: does this need to be recursive for our purposes?
+		}}
+		return target;
+	}
+
+	// does the chain group have any ready-to-execute scripts?
+	function check_chain_group_scripts_ready(chain_group) {
+		var any_scripts_ready = false;
+		for (var i=0; i<chain_group.scripts.length; i++) {
+			if (chain_group.scripts[i].ready && chain_group.scripts[i].exec_trigger) {
+				any_scripts_ready = true;
+				chain_group.scripts[i].exec_trigger();
+				chain_group.scripts[i].exec_trigger = null;
+			}
+		}
+		return any_scripts_ready;
+	}
+
+	// creates a script load listener
+	function create_script_load_listener(elem,registry_item,flag,onload) {
+		elem.onload = elem.onreadystatechange = function() {
+			if ((elem.readyState && elem.readyState != "complete" && elem.readyState != "loaded") || registry_item[flag]) return;
+			elem.onload = elem.onreadystatechange = null;
+			onload();
+		};
+	}
+
+	// script executed handler
+	function script_executed(registry_item) {
+		registry_item.ready = registry_item.finished = true;
+		for (var i=0; i<registry_item.finished_listeners.length; i++) {
+			registry_item.finished_listeners[i]();
+		}
+		registry_item.ready_listeners = [];
+		registry_item.finished_listeners = [];
+	}
+
+	// make the request for a scriptha
+	function request_script(chain_opts,script_obj,registry_item,onload,preload_this_script) {
+		// setTimeout() "yielding" prevents some weird race/crash conditions in older browsers
+		setTimeout(function(){
+			var script, src = script_obj.real_src, xhr;
+			
+			// don't proceed until `append_to` is ready to append to
+			if ("item" in append_to) { // check if `append_to` ref is still a live node list
+				if (!append_to[0]) { // `append_to` node not yet ready
+					// try again in a little bit -- note: will re-call the anonymous function in the outer setTimeout, not the parent `request_script()`
+					setTimeout(arguments.callee,25);
+					return;
+				}
+				// reassign from live node list ref to pure node ref -- avoids nasty IE bug where changes to DOM invalidate live node lists
+				append_to = append_to[0];
+			}
+			script = document.createElement("script");
+			if (script_obj.type) script.type = script_obj.type;
+			if (script_obj.charset) script.charset = script_obj.charset;
+			
+			// should preloading be used for this script?
+			if (preload_this_script) {
+				// real script preloading?
+				if (real_preloading) {
+					/*!START_DEBUG*/if (chain_opts[_Debug]) log_msg("start script preload: "+src);/*!END_DEBUG*/
+					registry_item.elem = script;
+					if (explicit_preloading) { // explicit preloading (aka, Zakas' proposal)
+						script.preload = true;
+						script.onpreload = onload;
+					}
+					else {
+						script.onreadystatechange = function(){
+							if (script.readyState == "loaded") onload();
+						};
+					}
+					script.src = src;
+					// NOTE: no append to DOM yet, appending will happen when ready to execute
+				}
+				// same-domain and XHR allowed? use XHR preloading
+				else if (preload_this_script && src.indexOf(root_domain) == 0 && chain_opts[_UseLocalXHR]) {
+					xhr = new XMLHttpRequest(); // note: IE never uses XHR (it supports true preloading), so no more need for ActiveXObject fallback for IE <= 7
+					/*!START_DEBUG*/if (chain_opts[_Debug]) log_msg("start script preload (xhr): "+src);/*!END_DEBUG*/
+					xhr.onreadystatechange = function() {
+						if (xhr.readyState == 4) {
+							xhr.onreadystatechange = function(){}; // fix a memory leak in IE
+							registry_item.text = xhr.responseText + "\n//@ sourceURL=" + src; // http://blog.getfirebug.com/2009/08/11/give-your-eval-a-name-with-sourceurl/
+							onload();
+						}
+					};
+					xhr.open("GET",src);
+					xhr.send();
+				}
+				// as a last resort, use cache-preloading
+				else {
+					/*!START_DEBUG*/if (chain_opts[_Debug]) log_msg("start script preload (cache): "+src);/*!END_DEBUG*/
+					script.type = "text/cache-script";
+					create_script_load_listener(script,registry_item,"ready",function() {
+						append_to.removeChild(script);
+						onload();
+					});
+					script.src = src;
+					append_to.insertBefore(script,append_to.firstChild);
+				}
+			}
+			// use async=false for ordered async? parallel-load-serial-execute http://wiki.whatwg.org/wiki/Dynamic_Script_Execution_Order
+			else if (script_ordered_async) {
+				/*!START_DEBUG*/if (chain_opts[_Debug]) log_msg("start script load (ordered async): "+src);/*!END_DEBUG*/
+				script.async = false;
+				create_script_load_listener(script,registry_item,"finished",onload);
+				script.src = src;
+				append_to.insertBefore(script,append_to.firstChild);
+			}
+			// otherwise, just a normal script element
+			else {
+				/*!START_DEBUG*/if (chain_opts[_Debug]) log_msg("start script load: "+src);/*!END_DEBUG*/
+				create_script_load_listener(script,registry_item,"finished",onload);
+				script.src = src;
+				append_to.insertBefore(script,append_to.firstChild);
+			}
+		},0);
+	}
+		
+	// create a clean instance of $LAB
+	function create_sandbox() {
+		var global_defaults = {},
+			can_use_preloading = real_preloading || xhr_or_cache_preloading,
+			queue = [],
+			registry = {},
+			instanceAPI
+		;
+		
+		// global defaults
+		global_defaults[_UseLocalXHR] = true;
+		global_defaults[_AlwaysPreserveOrder] = false;
+		global_defaults[_AllowDuplicates] = false;
+		global_defaults[_CacheBust] = false;
+		/*!START_DEBUG*/global_defaults[_Debug] = false;/*!END_DEBUG*/
+		global_defaults[_BasePath] = "";
+
+		// execute a script that has been preloaded already
+		function execute_preloaded_script(chain_opts,script_obj,registry_item) {
+			var script;
+			
+			function preload_execute_finished() {
+				if (script != null) { // make sure this only ever fires once
+					script = null;
+					script_executed(registry_item);
+				}
+			}
+			
+			if (registry[script_obj.src].finished) return;
+			if (!chain_opts[_AllowDuplicates]) registry[script_obj.src].finished = true;
+			
+			script = registry_item.elem || document.createElement("script");
+			if (script_obj.type) script.type = script_obj.type;
+			if (script_obj.charset) script.charset = script_obj.charset;
+			create_script_load_listener(script,registry_item,"finished",preload_execute_finished);
+			
+			// script elem was real-preloaded
+			if (registry_item.elem) {
+				registry_item.elem = null;
+			}
+			// script was XHR preloaded
+			else if (registry_item.text) {
+				script.onload = script.onreadystatechange = null;	// script injection doesn't fire these events
+				script.text = registry_item.text;
+			}
+			// script was cache-preloaded
+			else {
+				script.src = script_obj.real_src;
+			}
+			append_to.insertBefore(script,append_to.firstChild);
+
+			// manually fire execution callback for injected scripts, since events don't fire
+			if (registry_item.text) {
+				preload_execute_finished();
+			}
+		}
+	
+		// process the script request setup
+		function do_script(chain_opts,script_obj,chain_group,preload_this_script) {
+			var registry_item,
+				registry_items,
+				ready_cb = function(){ script_obj.ready_cb(script_obj,function(){ execute_preloaded_script(chain_opts,script_obj,registry_item); }); },
+				finished_cb = function(){ script_obj.finished_cb(script_obj,chain_group); }
+			;
+			
+			script_obj.src = canonical_uri(script_obj.src,chain_opts[_BasePath]);
+			script_obj.real_src = script_obj.src + 
+				// append cache-bust param to URL?
+				(chain_opts[_CacheBust] ? ((/\?.*$/.test(script_obj.src) ? "&_" : "?_") + ~~(Math.random()*1E9) + "=") : "")
+			;
+			
+			if (!registry[script_obj.src]) registry[script_obj.src] = {items:[],finished:false};
+			registry_items = registry[script_obj.src].items;
+
+			// allowing duplicates, or is this the first recorded load of this script?
+			if (chain_opts[_AllowDuplicates] || registry_items.length == 0) {
+				registry_item = registry_items[registry_items.length] = {
+					ready:false,
+					finished:false,
+					ready_listeners:[ready_cb],
+					finished_listeners:[finished_cb]
+				};
+
+				request_script(chain_opts,script_obj,registry_item,
+					// which callback type to pass?
+					(
+					 	(preload_this_script) ? // depends on script-preloading
+						function(){
+							registry_item.ready = true;
+							for (var i=0; i<registry_item.ready_listeners.length; i++) {
+								registry_item.ready_listeners[i]();
+							}
+							registry_item.ready_listeners = [];
+						} :
+						function(){ script_executed(registry_item); }
+					),
+					// signal if script-preloading should be used or not
+					preload_this_script
+				);
+			}
+			else {
+				registry_item = registry_items[0];
+				if (registry_item.finished) {
+					finished_cb();
+				}
+				else {
+					registry_item.finished_listeners.push(finished_cb);
+				}
+			}
+		}
+
+		// creates a closure for each separate chain spawned from this $LAB instance, to keep state cleanly separated between chains
+		function create_chain() {
+			var chainedAPI,
+				chain_opts = merge_objs(global_defaults,{}),
+				chain = [],
+				exec_cursor = 0,
+				scripts_currently_loading = false,
+				group
+			;
+			
+			// called when a script has finished preloading
+			function chain_script_ready(script_obj,exec_trigger) {
+				/*!START_DEBUG*/if (chain_opts[_Debug]) log_msg("script preload finished: "+script_obj.real_src);/*!END_DEBUG*/
+				script_obj.ready = true;
+				script_obj.exec_trigger = exec_trigger;
+				advance_exec_cursor(); // will only check for 'ready' scripts to be executed
+			}
+
+			// called when a script has finished executing
+			function chain_script_executed(script_obj,chain_group) {
+				/*!START_DEBUG*/if (chain_opts[_Debug]) log_msg("script execution finished: "+script_obj.real_src);/*!END_DEBUG*/
+				script_obj.ready = script_obj.finished = true;
+				script_obj.exec_trigger = null;
+				// check if chain group is all finished
+				for (var i=0; i<chain_group.scripts.length; i++) {
+					if (!chain_group.scripts[i].finished) return;
+				}
+				// chain_group is all finished if we get this far
+				chain_group.finished = true;
+				advance_exec_cursor();
+			}
+
+			// main driver for executing each part of the chain
+			function advance_exec_cursor() {
+				while (exec_cursor < chain.length) {
+					if (is_func(chain[exec_cursor])) {
+						/*!START_DEBUG*/if (chain_opts[_Debug]) log_msg("$LAB.wait() executing: "+chain[exec_cursor]);/*!END_DEBUG*/
+						try { chain[exec_cursor++](); } catch (err) {
+							/*!START_DEBUG*/if (chain_opts[_Debug]) log_error("$LAB.wait() error caught: ",err);/*!END_DEBUG*/
+						}
+						continue;
+					}
+					else if (!chain[exec_cursor].finished) {
+						if (check_chain_group_scripts_ready(chain[exec_cursor])) continue;
+						break;
+					}
+					exec_cursor++;
+				}
+				// we've reached the end of the chain (so far)
+				if (exec_cursor == chain.length) {
+					scripts_currently_loading = false;
+					group = false;
+				}
+			}
+			
+			// setup next chain script group
+			function init_script_chain_group() {
+				if (!group || !group.scripts) {
+					chain.push(group = {scripts:[],finished:true});
+				}
+			}
+
+			// API for $LAB chains
+			chainedAPI = {
+				// start loading one or more scripts
+				script:function(){
+					for (var i=0; i<arguments.length; i++) {
+						(function(script_obj,script_list){
+							var splice_args;
+							
+							if (!is_array(script_obj)) {
+								script_list = [script_obj];
+							}
+							for (var j=0; j<script_list.length; j++) {
+								init_script_chain_group();
+								script_obj = script_list[j];
+								
+								if (is_func(script_obj)) script_obj = script_obj();
+								if (!script_obj) continue;
+								if (is_array(script_obj)) {
+									// set up an array of arguments to pass to splice()
+									splice_args = [].slice.call(script_obj); // first include the actual array elements we want to splice in
+									splice_args.unshift(j,1); // next, put the `index` and `howMany` parameters onto the beginning of the splice-arguments array
+									[].splice.apply(script_list,splice_args); // use the splice-arguments array as arguments for splice()
+									j--; // adjust `j` to account for the loop's subsequent `j++`, so that the next loop iteration uses the same `j` index value
+									continue;
+								}
+								if (typeof script_obj == "string") script_obj = {src:script_obj};
+								script_obj = merge_objs(script_obj,{
+									ready:false,
+									ready_cb:chain_script_ready,
+									finished:false,
+									finished_cb:chain_script_executed
+								});
+								group.finished = false;
+								group.scripts.push(script_obj);
+								
+								do_script(chain_opts,script_obj,group,(can_use_preloading && scripts_currently_loading));
+								scripts_currently_loading = true;
+								
+								if (chain_opts[_AlwaysPreserveOrder]) chainedAPI.wait();
+							}
+						})(arguments[i],arguments[i]);
+					}
+					return chainedAPI;
+				},
+				// force LABjs to pause in execution at this point in the chain, until the execution thus far finishes, before proceeding
+				wait:function(){
+					if (arguments.length > 0) {
+						for (var i=0; i<arguments.length; i++) {
+							chain.push(arguments[i]);
+						}
+						group = chain[chain.length-1];
+					}
+					else group = false;
+					
+					advance_exec_cursor();
+					
+					return chainedAPI;
+				}
+			};
+
+			// the first chain link API (includes `setOptions` only this first time)
+			return {
+				script:chainedAPI.script, 
+				wait:chainedAPI.wait, 
+				setOptions:function(opts){
+					merge_objs(opts,chain_opts);
+					return chainedAPI;
+				}
+			};
+		}
+
+		// API for each initial $LAB instance (before chaining starts)
+		instanceAPI = {
+			// main API functions
+			setGlobalDefaults:function(opts){
+				merge_objs(opts,global_defaults);
+				return instanceAPI;
+			},
+			setOptions:function(){
+				return create_chain().setOptions.apply(null,arguments);
+			},
+			script:function(){
+				return create_chain().script.apply(null,arguments);
+			},
+			wait:function(){
+				return create_chain().wait.apply(null,arguments);
+			},
+
+			// built-in queuing for $LAB `script()` and `wait()` calls
+			// useful for building up a chain programmatically across various script locations, and simulating
+			// execution of the chain
+			queueScript:function(){
+				queue[queue.length] = {type:"script", args:[].slice.call(arguments)};
+				return instanceAPI;
+			},
+			queueWait:function(){
+				queue[queue.length] = {type:"wait", args:[].slice.call(arguments)};
+				return instanceAPI;
+			},
+			runQueue:function(){
+				var $L = instanceAPI, len=queue.length, i=len, val;
+				for (;--i>=0;) {
+					val = queue.shift();
+					$L = $L[val.type].apply(null,val.args);
+				}
+				return $L;
+			},
+
+			// rollback `[global].$LAB` to what it was before this file was loaded, the return this current instance of $LAB
+			noConflict:function(){
+				global.$LAB = _$LAB;
+				return instanceAPI;
+			},
+
+			// create another clean instance of $LAB
+			sandbox:function(){
+				return create_sandbox();
+			}
+		};
+
+		return instanceAPI;
+	}
+
+	// create the main instance of $LAB
+	global.$LAB = create_sandbox();
+
+
+	/* The following "hack" was suggested by Andrea Giammarchi and adapted from: http://webreflection.blogspot.com/2009/11/195-chars-to-help-lazy-loading.html
+	   NOTE: this hack only operates in FF and then only in versions where document.readyState is not present (FF < 3.6?).
+	   
+	   The hack essentially "patches" the **page** that LABjs is loaded onto so that it has a proper conforming document.readyState, so that if a script which does 
+	   proper and safe dom-ready detection is loaded onto a page, after dom-ready has passed, it will still be able to detect this state, by inspecting the now hacked 
+	   document.readyState property. The loaded script in question can then immediately trigger any queued code executions that were waiting for the DOM to be ready. 
+	   For instance, jQuery 1.4+ has been patched to take advantage of document.readyState, which is enabled by this hack. But 1.3.2 and before are **not** safe or 
+	   fixed by this hack, and should therefore **not** be lazy-loaded by script loader tools such as LABjs.
+	*/ 
+	(function(addEvent,domLoaded,handler){
+		if (document.readyState == null && document[addEvent]){
+			document.readyState = "loading";
+			document[addEvent](domLoaded,handler = function(){
+				document.removeEventListener(domLoaded,handler,false);
+				document.readyState = "complete";
+			},false);
+		}
+	})("addEventListener","DOMContentLoaded");
+
+})(this);
\ No newline at end of file