function ReplaceContentLi() {
	var MyDiv = document.getElementById("Content");
	var MyList = MyDiv.getElementsByTagName("li");
	var i;
	for(i = 0; i < MyList.length; i++)
		if (i%2) {
			MyList[i].className="List1";	
		} else {
			MyList[i].className="List2";
		}
}