Ok:
<html>
<head>
<title>Javascript Document Resizer</title>
<script type="text/javascript">
// Made by Nile
//UnlinkThis.net
//This credit tag must not be removed!
var size = new Array("XSmall", "Small", "Medium", "Lage", "XLarge", "XXLarge");
var reSize = function(size){
document.body.style.zoom = screen.width/size;
};
</script>
</head>
<body>
<img src="http://puppywar.com/images/cards/31309.jpg" /><img src="http://www.classact.ca/RubberStamps/Dogs/D06B_B_Large%20Dog%20Paw.jpg" /><br />
<h1>HTML Ipsum Presents</h1>
<p><strong>Pellentesque habitant morbi tristique</strong> senectus et netus et malesuada fames ac turpis egestas. Vestibulum tortor quam, feugiat vitae, ultricies eget, tempor sit amet, ante. Donec eu libero sit amet quam egestas semper. <em>Aenean ultricies mi vitae est.</em> Mauris placerat eleifend leo. Quisque sit amet est et sapien ullamcorper pharetra. Vestibulum erat wisi, condimentum sed, <code>commodo vitae</code>, ornare sit amet, wisi. Aenean fermentum, elit eget tincidunt condimentum, eros ipsum rutrum orci, sagittis tempus lacus enim ac dui. <a href="#">Donec non enim</a> in turpis pulvinar facilisis. Ut felis.</p>
<ol>
<li>Lorem ipsum dolor sit amet, consectetuer adipiscing elit.</li>
<li>Aliquam tincidunt mauris eu risus.</li>
</ol>
<blockquote><p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus magna. Cras in mi at felis aliquet congue. Ut a est eget ligula molestie gravida. Curabitur massa. Donec eleifend, libero at sagittis mollis, tellus est malesuada tellus, at luctus turpis elit sit amet quam. Vivamus pretium ornare est.</p></blockquote>
<ul>
<li>Lorem ipsum dolor sit amet, consectetuer adipiscing elit.</li>
<li>Aliquam tincidunt mauris eu risus.</li>
</ul>
<pre><code>
#header h1 a {
display: block;
width: 300px;
height: 80px;
}
</code></pre>
<div id="zoomer">
<input type="button" value="Small" onclick="reSize(screen.width+100)"/><input type="button" value="Medium" onclick="reSize(screen.width)"/><input type="button" value="Large" onclick="reSize(1100)"/><input type="button" value="XLarge" onclick="reSize(1000)"/>
</div>
The highlighted are the parts you need. Place the first highlighted text into the <head> part of your document, and the second highlighted text in any part of the <body> tag in your document you want.