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copied!<p>Well, first of all I want to tell you that <code>Object.prototype.toString</code> returns the value of the object's internal <code>[[Class]]</code> property, it isn't really a <em>Type</em>.</p> <p>The value of this internal property represents the <em>specification defined classification</em> of an object (more info <a href="https://stackoverflow.com/questions/3250379/what-is-the-call-function-doing-in-this-javascript-statement/3250415#3250415">here</a>).</p> <p>Javascript has only 6 <em>language types</em>: <em>Object, String, Number, Boolean, Null and Undefined</em>, that's it.</p> <p>The value of the <code>[[Class]]</code> internal property for host objects -as DOM elements- can be <strong>anything</strong>, it is completely <em>implementation-dependent</em>, on built-in objects is safe to use it -except with some exceptions in IE as @Alex pointed out in the article linked in his answer-.</p> <p>You are working with DOM elements, and you want to figure out what kind of node it is, my suggestion to this, is to simply use the <code>nodeName</code> property <sub>(please avoid using <code>tagName</code>)</sub>.</p> <p>The <code>nodeName</code> property contains the name of the node you are dealing it, in upper case, therefore you could use it as this:</p> <pre><code>function getFilteredElements() { var tabContent = getElementsByClass("tabContentWrap", document.getElementById(tabWrapId), "div"); for (var j = 0; j < tabContent.length; j++){ tabContentLinks = tabContent[j].getElementsByTagName('*'); for (var k = 0; k < tabContentLinks.length; k++){ // Here i attempt to filter the collection if (tabContentLinks[k].nodeName == 'SELECT') { // <- SELECT elements alert("found select list"); } } } } </code></pre>

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