var bloque = 0;
	
	if (document.images) {
		var bnav_off = new Array();
		var bnav_on = new Array();
		for (i = 1; i < 6; i++) {
			bnav_off[i] = new Image();
			bnav_off[i].src = "img/bottomnav" + i + "_f.gif";
			bnav_on[i] = new Image();
			bnav_on[i].src = "img/bottomnav" + i + "_o.gif";
		}
	}
		
	function over_bnav(i, st) {
		document.images['bnav' + i].src = bnav_on[i].src;
		window.status = st;
	}
	
	function out_bnav(i) {
		if ((i + 19) != bloque) document.images['bnav' + i].src = bnav_off[i].src;
		window.status = " ";
	}