<script language="JavaScript">    
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var backgroundOffset = 0;    
var bgObject = eval('document.body');    
function scrollBG(maxSize) {    
backgroundOffset = backgroundOffset + 1;    
if (backgroundOffset > maxSize) backgroundOffset = 0;    
bgObject.style.backgroundPosition = "0 " + backgroundOffset;    
}    
var ScrollTimer = window.setInterval("scrollBG(307)", 64);    
// End -->    
</script>