mHover = function() {
	var choix;
	var dessus;
	for (var i = 0; i < document.styleSheets.length; i++)
		for (var x = 0; x < document.styleSheets[i].rules.length ; x++)
			{
			choix = document.styleSheets[i].rules[x];
			if (choix.selectorText.indexOf("LI:hover") != -1)
			{
				 dessus = choix.selectorText.replace(/LI:hover/gi, "LI.iehover");
				document.styleSheets[i].addRule(dessus , choix.style.cssText);
			}
		}
	var getElm = document.getElementById("nav").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", mHover);