var initPage = function() {
	initNav();
}
var initNav = function() {
	var menu_m = document.getElementById('nav');
	if (menu_m) {
		var lis = menu_m.getElementsByTagName('li');
		for (var i = 0; i < lis.length; i++){
			lis[i].onmouseover = function() {
				this.className += ' hover';
			};
			lis[i].onmouseout = function() {
				this.className = this.className.replace('hover','');
			};
		}
	}
}
if (window.addEventListener){
	window.addEventListener("load", initPage, false);
} else if (window.attachEvent){
	window.attachEvent("onload", initPage);
}