<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>