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    copied!<p>Here's a way of achieving this in jQuery. You could choose to add a class to the body instead if you like, but remember to remove other classes first.</p> <pre><code>&lt;!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"&gt; &lt;html&gt; &lt;head&gt; &lt;meta http-equiv="content-type" content="text/html; charset=windows-1250"&gt; &lt;meta name="generator" content="PSPad editor, www.pspad.com"&gt; &lt;title&gt;&lt;/title&gt; &lt;script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js" type="text/javascript"&gt;&lt;/script&gt; &lt;script type="text/javascript"&gt; $(document).ready(function(){ $('#colour').change(function(){ $('body').css('background',$(this).val()); }); }); &lt;/script&gt; &lt;/head&gt; &lt;body&gt; &lt;select id="colour"&gt; &lt;option value=""&gt;Please Select &lt;option value="#00F"&gt;Blue&lt;/option&gt; &lt;option value="#F00"&gt;Red&lt;/option&gt; &lt;option value="#0F0"&gt;Green&lt;/option&gt; &lt;/select&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <p>or via classes:</p> <pre><code>&lt;!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"&gt; &lt;html&gt; &lt;head&gt; &lt;meta http-equiv="content-type" content="text/html; charset=windows-1250"&gt; &lt;meta name="generator" content="PSPad editor, www.pspad.com"&gt; &lt;title&gt;&lt;/title&gt; &lt;script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js" type="text/javascript"&gt;&lt;/script&gt; &lt;script type="text/javascript"&gt; $(document).ready(function(){ $('#colour').change(function(){ $('body').removeClass('blue red green').addClass($(this).val()); }); }); &lt;/script&gt; &lt;style type="text/css"&gt; .blue { background: #00F; } .green { background: #0F0; } .red { background: #F00; } &lt;/style&gt; &lt;/head&gt; &lt;body&gt; &lt;select id="colour"&gt; &lt;option value=""&gt;Please Select &lt;option value="blue"&gt;Blue&lt;/option&gt; &lt;option value="red"&gt;Red&lt;/option&gt; &lt;option value="green"&gt;Green&lt;/option&gt; &lt;/select&gt; &lt;/body&gt; &lt;/html&gt; </code></pre>
 

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