function topMenu(){
	if(navigator.appVersion.indexOf("MSIE")==-1){
		return;
	}
	var i,k,g,lg,r=/\s*mainNavHvr/,nn='',c,cs='mainNavHvr',bv='mainNav';
	for(i=0;i<10;i++){
		g=document.getElementById(bv+nn);
		if(g){
			lg=g.getElementsByTagName("LI");
			if(lg){
				for(k=0;k<lg.length;k++){
					lg[k].onmouseover=function(){
						c=this.className;cl=(c)?c+' '+cs:cs;
						this.className=cl;};lg[k].onmouseout=function(){
							c=this.className;
							this.className=(c)?c.replace(r,''):'';
						};
					}
				}
			}
			nn=i+1;
		}
	}
window.onload = topMenu;