var img = new Array();
	img[0] = new Image();  img[0].src = "img/top_req_on.gif";
	img[1] = new Image();  img[1].src = "img/top_sit_on.gif";
	img[2] = new Image();  img[2].src = "img/top_div_on.gif";
	img[3] = new Image();  img[3].src = "img/top_tec_on.gif";
	img[4] = new Image();  img[4].src = "img/top_pla_on.gif";
	img[5] = new Image();  img[5].src = "img/top_man_on.gif";
	img[6] = new Image();  img[6].src = "img/top_cor_on.gif";


	function overevent(n){
		document.images["top_" + n].src="img/top_" + n + "_on.gif";
	}
	function outevent(n){
		document.images["top_" + n].src="img/top_" + n + "_of.gif";
	}