diff --git a/resources/inc/class.ui_resources.inc.php b/resources/inc/class.ui_resources.inc.php
index e5196f8210..71b2159b06 100755
--- a/resources/inc/class.ui_resources.inc.php
+++ b/resources/inc/class.ui_resources.inc.php
@@ -19,6 +19,7 @@ class ui_resources
 		'index'		=> True,
 		'edit'		=> True,
 		'show'		=> True,
+		'select'	=> True,
 		'admin'		=> True,
 		'writeLangFile'	=> True
 		);
@@ -78,6 +79,8 @@ class ui_resources
 					case 'view':
 						list($id) = each($content['nm']['rows']['view']);
 						return $this->show($id);
+					case 'select': // note: this is a popup dialog
+						return $this->select();
 					case 'bookable':
 					case 'buyable':
 				}
@@ -296,6 +299,113 @@ class ui_resources
 		
 	}
 
+	/**
+	 * select resources
+	 *
+	 * @author Lukas Weiss <wnz.gh05t@users.sourceforge.net>
+	 */
+	function select()
+	{
+		if (isset($_GET['name'])) $name = $_GET['name'];
+		$content=array('js_id' => $name)
+		$content['js'] = "<script LANGUAGE=\"JavaScript\">
+	window.focus();
+
+	function addOption(id,label,value,multiple)
+	{
+		openerSelectBox = opener.document.getElementById(id);
+
+		if (multiple && openerSelectBox) {
+			select = '';
+			for(i=0; i < openerSelectBox.length; i++) {
+				with (openerSelectBox.options[i]) {
+					if (selected || openerSelectBox.selectedIndex == i) {
+						select += (value.slice(0,1)==',' ? '' : ',')+value;
+					}
+				}
+			}
+			select += (select ? ',' : '')+value;
+			opener.addOption(id,label,value,0);
+			opener.addOption(id,'multiple*',select,0);
+		}
+		else {
+			opener.addOption(id,label,value,!multiple && openerSelectBox && openerSelectBox.selectedIndex < 0);
+		}
+		selectBox = document.getElementById('uiaccountsel_popup_selection');
+		if (selectBox) {
+			for (i=0; i < selectBox.length; i++) {
+				if (selectBox.options[i].value == value) {
+					selectBox.options[i].selected = true;
+					break;
+				}
+			}
+			if (i >= selectBox.length) {
+				selectBox.options[selectBox.length] = new Option(label,value,false,true);
+			}
+		}
+	}
+
+	function removeSelectedOptions(id)
+	{
+		openerSelectBox = opener.document.getElementById(id);
+		if (openerSelectBox == null) window.close();
+		selectBox = document.getElementById('uiaccountsel_popup_selection');
+		for (i=0; i < selectBox.length; i++) {
+			if (selectBox.options[i].selected) {
+				for (j=0; j < openerSelectBox.length; j++) {
+					if (openerSelectBox[j].value == selectBox.options[i].value) {
+						openerSelectBox.removeChild(openerSelectBox[j]);
+					}
+				}
+				selectBox.options[i--] = null;
+			}
+		}
+	}
+
+	function copyOptions(id)
+	{
+		openerSelectBox = opener.document.getElementById(id);
+		selectBox = document.getElementById('uiaccountsel_popup_selection');
+		for (i=0; i < openerSelectBox.length; i++) {
+			with (openerSelectBox.options[i]) {
+				if (selected && value.slice(0,1) != ',') {
+					selectBox.options[selectBox.length] =  new Option(text,value);
+				}
+			}
+		}
+	}
+	
+	function oneLineSubmit(id)
+	{
+		openerSelectBox = opener.document.getElementById(id);
+
+		if (openerSelectBox) {
+			if (openerSelectBox.selectedIndex >= 0) {
+				selected = openerSelectBox.options[openerSelectBox.selectedIndex].value;
+				if (selected.slice(0,1) == ',') selected = selected.slice(1);
+				opener.addOption(id,'multiple*',selected,1);
+			}
+			else {
+				for (i=0; i < openerSelectBox.length; i++) {
+					with (openerSelectBox.options[i]) {
+						if (selected) {
+							opener.addOption(id,text,value,1);
+							break;
+						}
+					}
+				}	
+			}
+		}
+		window.close();
+	}	
+</script>";
+		$sel_options = array();
+		$no_button = array();
+		$preserv = $content;
+		$this->tmpl->read('resources.resource_select');
+		$this->tmpl->exec('resources.ui_resources.select',$content,$sel_options,$no_button,$preserv,2);
+}
+
 	/**
 	 * deletes a resource
 	 *
diff --git a/resources/templates/default/app.css b/resources/templates/default/app.css
index 788d56412f..95a8ab03a7 100644
--- a/resources/templates/default/app.css
+++ b/resources/templates/default/app.css
@@ -1,2 +1,4 @@
 .buttonbox {vertical-align: top;}
 .tdAppbox {width: 100%;}
+.big {font-weight: bold;}
+select.sel {width: 100%;}
\ No newline at end of file