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    <p>This code is an infinite loop if <code>node !== "none"</code> when the loop starts:</p> <pre><code>while (node !== "none") { (lastnode++); (a++); } </code></pre> <p>Nothing in the loop changes the value of <code>node</code> so once the loop starts, it will never stop.</p> <p>Also, this syntax is odd and not required:</p> <pre><code>(lastnode++); </code></pre> <p>Remove the parens so it's just:</p> <pre><code>lastnode++; </code></pre> <p>Using the jQuery library (which makes cross browser DOM manipulation sooo much easier), here's some code to find the first item in a list that is set to display: none.</p> <p>Here's a working version: <a href="http://jsfiddle.net/jfriend00/Um95a/" rel="nofollow">http://jsfiddle.net/jfriend00/Um95a/</a></p> <p>and the code:</p> <p>HTML:</p> <pre><code>&lt;ul id="container"&gt; &lt;li class="show"&gt;First item&lt;/li&gt; &lt;li class="hide"&gt;Second item&lt;/li&gt; &lt;li class="show"&gt;Third item&lt;/li&gt; &lt;li class="show"&gt;Fourth item&lt;/li&gt; &lt;li class="show"&gt;Fifth item&lt;/li&gt; &lt;/ul&gt; &lt;br&gt;&lt;br&gt; &lt;div id="result"&gt;&lt;/div&gt; </code></pre> <p>CSS:</p> <pre><code>.hide {display: none;} </code></pre> <p>Javascript (run after page is loaded):</p> <pre><code>function findFirstDisplayNoneChild(parent) { var result = null; $("#" + parent + " li").each(function() { if ($(this).css("display") == "none") { result = this; return(false); // break out of each() function } }); return(result); } var hidden = findFirstDisplayNoneChild("container"); if (hidden) { $("#result").html("Hidden Element: '" + hidden.innerHTML + "'"); } else { $("#result").html("No hidden elements found"); } </code></pre> <p>Or, any even simpler version of the code using the :hidden selector:</p> <p><a href="http://jsfiddle.net/jfriend00/Xsgmu/" rel="nofollow">http://jsfiddle.net/jfriend00/Xsgmu/</a></p> <pre><code>function findFirstDisplayNoneChild(parent) { return($("#" + parent + " li:hidden").get(0)); } </code></pre>
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    1. CObut 'node' does change because it changes when 'a' changes, right?
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    2. CO`a` is just a numeric variable initialized to zero. Manipulating it has nothing to do with `node`. You would have to assign something to node within the loop or call a function within the loop that changes the value of node.
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    3. COBut doesn't it? I mean, 'b' is dependent on the value of 'a', and 'node' depends on 'b'.
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