2004-04-21 00:45:00 +02:00
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<html>
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<head>
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<title>Example of HTMLArea 3.0</title>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<!-- Configure the path to the editor. We make it relative now, so that the
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example ZIP file will work anywhere, but please NOTE THAT it's better to
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have it an absolute path, such as '/htmlarea/'. -->
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<script type="text/javascript">
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_editor_url = "../";
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_editor_lang = "en";
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</script>
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<!-- load the main HTMLArea file, this will take care of loading the CSS and
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other required core scripts. -->
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<script type="text/javascript" src="../htmlarea.js"></script>
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<!-- load the plugins -->
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<script type="text/javascript">
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// WARNING: using this interface to load plugin
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// will _NOT_ work if plugins do not have the language
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// loaded by HTMLArea.
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// In other words, this function generates SCRIPT tags
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// that load the plugin and the language file, based on the
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// global variable HTMLArea.I18N.lang (defined in the lang file,
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// in our case "lang/en.js" loaded above).
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// If this lang file is not found the plugin will fail to
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2005-06-19 15:37:50 +02:00
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// load correctly and nothing will work.
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2004-04-21 00:45:00 +02:00
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HTMLArea.loadPlugin("TableOperations");
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HTMLArea.loadPlugin("SpellChecker");
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HTMLArea.loadPlugin("FullPage");
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HTMLArea.loadPlugin("CSS");
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HTMLArea.loadPlugin("ContextMenu");
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2005-06-19 15:37:50 +02:00
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HTMLArea.loadPlugin("HtmlTidy");
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2004-04-21 00:45:00 +02:00
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HTMLArea.loadPlugin("ListType");
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</script>
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<style type="text/css">
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html, body {
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font-family: Verdana,sans-serif;
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background-color: #fea;
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color: #000;
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}
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a:link, a:visited { color: #00f; }
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a:hover { color: #048; }
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a:active { color: #f00; }
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textarea { background-color: #fff; border: 1px solid 00f; }
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</style>
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<script type="text/javascript">
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var editor = null;
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function initEditor() {
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// create an editor for the "ta" textbox
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editor = new HTMLArea("ta");
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// register the FullPage plugin
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editor.registerPlugin(FullPage);
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// register the SpellChecker plugin
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editor.registerPlugin(TableOperations);
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// register the SpellChecker plugin
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editor.registerPlugin(SpellChecker);
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// register the HtmlTidy plugin
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2005-06-19 15:37:50 +02:00
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editor.registerPlugin(HtmlTidy);
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2004-04-21 00:45:00 +02:00
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// register the ListType plugin
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editor.registerPlugin(ListType);
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// register the CSS plugin
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editor.registerPlugin(CSS, {
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combos : [
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{ label: "Syntax:",
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// menu text // CSS class
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options: { "None" : "",
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"Code" : "code",
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"String" : "string",
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"Comment" : "comment",
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"Variable name" : "variable-name",
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"Type" : "type",
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"Reference" : "reference",
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"Preprocessor" : "preprocessor",
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"Keyword" : "keyword",
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"Function name" : "function-name",
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"Html tag" : "html-tag",
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"Html italic" : "html-helper-italic",
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"Warning" : "warning",
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"Html bold" : "html-helper-bold"
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},
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context: "pre"
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},
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{ label: "Info:",
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options: { "None" : "",
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"Quote" : "quote",
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"Highlight" : "highlight",
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"Deprecated" : "deprecated"
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}
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}
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]
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});
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// add a contextual menu
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editor.registerPlugin("ContextMenu");
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// load the stylesheet used by our CSS plugin configuration
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editor.config.pageStyle = "@import url(custom.css);";
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2005-06-19 15:37:50 +02:00
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setTimeout(function() {
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editor.generate();
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}, 500);
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2004-04-21 00:45:00 +02:00
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return false;
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}
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function insertHTML() {
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var html = prompt("Enter some HTML code here");
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if (html) {
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editor.insertHTML(html);
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}
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}
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function highlight() {
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editor.surroundHTML('<span style="background-color: yellow">', '</span>');
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}
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</script>
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</head>
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<!-- use <body onload="HTMLArea.replaceAll()" if you don't care about
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customizing the editor. It's the easiest way! :) -->
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2005-06-19 15:37:50 +02:00
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<body onload="initEditor()">
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2004-04-21 00:45:00 +02:00
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<h1>HTMLArea 3.0</h1>
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<p>A replacement for <code>TEXTAREA</code> elements. © <a
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href="http://interactivetools.com">InteractiveTools.com</a>, 2003-2004.</p>
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<form action="test.cgi" method="post" id="edit" name="edit">
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<textarea id="ta" name="ta" style="width:100%" rows="24" cols="80">
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<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 3.2//EN">
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<html>
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<head>
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<title>Passing parameters to JavaScript code</title>
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<link rel="stylesheet" href="custom.css" />
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</head>
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<body>
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<h1>Passing parameters to JavaScript code</h1>
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<p>Sometimes we need to pass parameters to some JavaScript function that we
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wrote ourselves. But sometimes it's simply more convenient to include the
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parameter not in the function call, but in the affected HTML elements.
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Usually, all JavaScript calls affect some element, right? ;-)</p>
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<p>Well, here's an original way to do it. Or at least, I think it's
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original.</p>
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<h2>But first...</h2>
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<p>... an example. Why would I need such thing? I have a JS function that
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is called on <code>BODY</code> <code>onload</code> handler. This function
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tries to retrieve the element with the ID "conttoc" and, if present, it will
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<a href="toc.epl" title="Automatic TOC generation">generate an index</a>.
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The problem is, this function exists in some external JavaScript library
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that it's loaded in page. I only needed to pass the parameter from
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<em>one</em> page. Thus, it makes sense to pass the parameter from the HTML
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code on <em>that</em> page, not to affect the others.</p>
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<p>The first idea that came to me was to use some attribute, like "id" or
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"class". But "id" was locked already, it <em>had</em> to be "conttoc". Use
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"class"? It's not elegant.. what if I really wanted to give it a class, at
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some point?</p>
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<h2>The idea</h2>
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<p>So I thought: what are the HTML elements that do not affect the page
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rendering in any way? Well, comments. I mean, <em>comments</em>, HTML
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comments. You know, like <code>&lt;!-- this is a comment --&gt;</code>.</p>
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<p>Though comments do not normally affect the way browser renders the page,
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they are still parsed and are part of the DOM, as well as any other node.
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But this mean that we can access comments from JavaScript code, just like we
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access any other element, right? Which means that they <em>can</em> affect
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the way that page finally appears ;-)</p>
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<h2>The code</h2>
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<p>The main part was the idea. The code is simple ;-) Suppose we have the
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following HTML code:</p>
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<pre class="code"><span class="function-name">&lt;</span><span class="html-tag">div</span> <span class="variable-name">id=</span><span class="string">&quot;conttoc&quot;</span><span class="paren-face-match">&gt;</span><span class="function-name">&lt;</span><span class="html-tag">/div</span><span class="function-name">&gt;</span></pre>
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<p>and our function checks for the presence an element having the ID
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"conttoc", and generates a table of contents into it. Our code will also
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check if the "conttoc" element's first child is a comment node, and if so
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will parse additional parameters from there, for instance, a desired prefix
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for the links that are to be generated into it. Why did I need it? Because
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if the page uses a <code>&lt;base&gt;</code> element to specify the default
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link prefix, then links like "#gen1" generated by the <a href="toc.epl">toc
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generator</a> will not point to that same page as they should, but to the
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page reffered from <code>&lt;base&gt;</code>.</p>
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<p>So the HTML would now look like this:</p>
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<pre class="code"><span class="function-name">&lt;</span><span class="html-tag">div</span> <span class="variable-name">id=</span><span class="string">&quot;conttoc&quot;</span><span class="function-name">&gt;</span><span class="comment">&lt;!-- base:link/prefix.html --&gt;</span><span class="paren-face-match">&lt;</span><span class="html-tag">/div</span><span class="paren-face-match">&gt;</span></pre>
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<p>And our TOC generation function does something like this:</p>
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<pre class="code"><span class="keyword">var</span> <span class="variable-name">element</span> = getElementById(&quot;<span class="string">conttoc</span>&quot;);
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<span class="keyword">if</span> (element.firstChild &amp;&amp; element.firstChild.nodeType == 8) {
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<span class="comment">// 8 means Node.COMMENT_NODE. We're using numeric values
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</span> <span class="comment">// because IE6 does not support constant names.
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</span> <span class="keyword">var</span> <span class="variable-name">parameters</span> = element.firstChild.data;
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<span class="comment">// at this point &quot;parameters&quot; contains base:link/prefix.html
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</span> <span class="comment">// ...
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</span>}</pre>
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<p>So we retrieved the value passed to the script from the HTML code. This
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was the goal of this article.</p>
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<hr />
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<address><a href="http://students.infoiasi.ro/~mishoo/">Mihai Bazon</a></address>
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<!-- hhmts start --> Last modified on Thu Apr 3 20:34:17 2003
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<!-- hhmts end -->
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<!-- doc-lang: English -->
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</body>
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</html>
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</textarea>
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<p />
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<input type="submit" name="ok" value=" submit " />
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<input type="button" name="ins" value=" insert html " onclick="return insertHTML();" />
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<input type="button" name="hil" value=" highlight text " onclick="return highlight();" />
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<a href="javascript:mySubmit()">submit</a>
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<script type="text/javascript">
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function mySubmit() {
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// document.edit.save.value = "yes";
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document.edit.onsubmit(); // workaround browser bugs.
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document.edit.submit();
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};
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</script>
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</form>
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</body>
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</html>
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