function add_rollover(name) {
	var el = document.getElementById(name);
	el.onmouseover = function() {
		this.className = "NFButton NFh";
		document.getElementById(name+'l').className = "NFButtonLeft NFh";
		document.getElementById(name+'r').className = "NFButtonRight NFh";
	};
	el.onmouseout = function() {
		this.className = "NFButton";
		document.getElementById(name+'l').className = "NFButtonLeft";
		document.getElementById(name+'r').className = "NFButtonRight";
	};
}