stuHover = function(){
    //alert('run stuHover');
	var cssRule;
	var newSelector;
	for(var i = 0; i < document.styleSheets.length; i++)
		for(var x = 0; x < document.styleSheets[i].rules.length ; x++){
			cssRule = document.styleSheets[i].rules[x];
			if(cssRule.selectorText.indexOf("LI:hover") != -1){
				newSelector = cssRule.selectorText.replace(/LI:hover/gi, "LI.iehover");
				document.styleSheets[i].addRule(newSelector , cssRule.style.cssText);
			}
		}

	var getElm = document.getElementById("nav-menu").getElementsByTagName("LI");
	for(var i=0; i<getElm.length; i++){
		getElm[i].onmouseover=function(){
			this.className+=" iehover";
		}
		getElm[i].onmouseout=function(){
			this.className=this.className.replace(new RegExp(" iehover\\b"), "");
		}
	}
}

if(window.attachEvent){
    window.attachEvent("onload", stuHover);
}