var info = new Image();
	info.src = "img/ico_info_off.gif"
	var att = new Image();
	att.src = "img/ico_att_off.gif"
	var news = new Image();
	news.src = "img/ico_news_off.gif"
	var mat = new Image();
	mat.src = "img/ico_mat_off.gif"
	var cont = new Image();
	cont.src = "img/ico_cont_off.gif"
	var links = new Image();
	links.src = "img/ico_link_off.gif"
	

	var info_on = new Image();
	info_on.src = "img/ico_info_on.gif"
	var att_on = new Image();
	att_on.src = "img/ico_att_on.gif"
	var news_on = new Image();
	news_on.src = "img/ico_news_on.gif"
	var mat_on = new Image();
	mat_on.src = "img/ico_mat_on.gif"
	var cont_on = new Image();
	cont_on.src = "img/ico_cont_on.gif"
	var links_on = new Image();
	links_on.src = "img/ico_link_on.gif"

	function rollon(imgID) {
		document.getElementById(imgID).src = eval(imgID + "_on.src");
	}
	
	function rollout(imgID) {
		document.getElementById(imgID).src = eval(imgID + ".src");
	}