var hideObject;

function popup(url, name, width, height) {
	settings="toolbar=no, location=no, directories=no, status=no, menubar=no, scrollbars=no, resizable=no, left=150, top=75, screenX=150, screenY=75, width="+width+", height="+height;
	
	NewWindow=window.open(url,name,settings);
}

function showObject(id) {
   toShow = document.getElementById(id);
   toShow.style.visibility = "visible";
   clearTimeout(toShow.timer);
}

function hideObject(id) {
   document.getElementById(id).style.visibility = "hidden";
}

function hideObjectDelayed(id, delay) {
   toHide = document.getElementById(id);
   hideFunction = "hideObject('" + id + "')";
   toHide.timer = setTimeout(hideFunction, delay);
}

function check(id)
{
	 document.getElementById(id).checked = true ;
}

function printpage() {
	window.print();  
}

function roll_on(rollImage)
{
	rollImage.src = "images/" + rollImage.getAttribute('id') + "_on.gif";
}

function roll_off(rollImage)
{
	rollImage.src = "images/" + rollImage.getAttribute('id') + ".gif";
}