sfh = function() {
	var sfe = document.getElementById("main_navi").getElementsByTagName("li");
	for (var i=0; i<sfe.length; i++) {
		sfe[i].onmouseover=function() {
			this.className+=" sfhover";
		}
		sfe[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
		}
	}
}
if (window.attachEvent) window.attachEvent("onload", sfh);