sfHover = function() { 
	var sfEls = document.getElementById("mainnav").getElementsByTagName("LI"); 
	for (var i=0; i<sfEls.length; i++) { 
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			this.className+=" sfhover"; 
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		sfEls[i].onmouseout=function() { 
			this.className=this.className.replace(new RegExp(" sfhover\\b"), ""); 
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} 
if (window.attachEvent) window.attachEvent("onload", sfHover);