function collapse() {
	var divs1 = document.getElementsByTagName("div");
		for(var i=0;i<divs1.length;i++) {
			var getValue = divs1[i].className;
			if (getValue == "popout") {
				divs1[i].style.visibility="hidden";
				}
		}
}

function expand(item) {
	collapse();
	obj1=document.getElementById(item);
	obj1.style.visibility="visible";
}

function roll_over(img_name, img_src) {
	document[img_name].src = img_src;
}

/*function hidediv() {
	var divs2=document.getElementsByTagName("div")
		for(var x=0;x<divs2.length;x++) {
		var getValue = divs2[x].className;
			if (getValue == "navTbls") {
				divs2[x].style.visibility="hidden";
				}
		}
}

function changeto(item) {
hidediv();
obj2=document.getElementById(item);
obj2.style.visibility="visible";
}
*/