This is the Java Script I got from SitePoint forum. Unfortunately, I'm not familiar with Java, maybe you guys can test it. And hope this could help any of you.
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<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript">
// set constants
var $pageheight = 189; // our single page height
var $pagewidth = 146; // our single page width
