function menuFix() {  
var sfEls = document.getElementById("mnav").getElementsByTagName("li");  
for (var i=0; i<sfEls.length; i++) {  
sfEls[i].onmouseover=function() {  
this.className+=(this.className.length>0? " ": "") + "sfhover";  
}  
sfEls[i].onMouseDown=function() {  
this.className+=(this.className.length>0? " ": "") + "sfhover";  
}  
sfEls[i].onMouseUp=function() {  
this.className+=(this.className.length>0? " ": "") + "sfhover";  
}  
sfEls[i].onmouseout=function() {  
this.className=this.className.replace(new RegExp("( ?|^)sfhover\\b"),  
 
"");  
}  
}  
}  
window.onload=menuFix;