function sfHover() {
	var sfEls = document.getElementById("main-nav").getElementsByTagName("li");
	for (var i=0; i<sfEls.length; i++) {
		sfEls[i].onmouseover=function() {
			this.className+=" sfhover";
		}
		sfEls[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" sfhover"), "");
		}
	}
}


(function () {
    var oldOnload = function() {};
    if (window.onload) {
        oldOnload = window.onload;
    }
    window.onload = function() {
        oldOnload();
        if(window.attachEvent) sfHover();
    }
})();