sfHover = function() {
	var sfEls = document.getElementById("nav").getElementsByTagName("LI");
	for (var i=0; i<sfEls.length; i++) {
		sfEls[i].onmouseover=function() {
			this.className+=" sfhover";
		}
		sfEls[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
		}
	}
}
if (window.attachEvent) window.attachEvent("onload", sfHover);


function exp(no) {
	x = document.getElementById(no);
	if(x.innerHTML == 0) {
		expand(no);
	} else {
		contract(no);
	}
}

function getLay(no) {	
	//alert("faf");
	y = document.getElementById("div" + no).innerHTML;
	p = "<div class=\"vis_text\">" + y + "</div>";
	//alert(p);
	return p;
}

function contract(no) {
	x = document.getElementById(no);
	x.innerHTML = "";
}

function expand(no) {
	x = document.getElementById(no);
	q = getLay(no);
	x.innerHTML = q;
}