// Extended Tooltip Javascript
// copyright 9th August 2002, 3rd July 2005, 24th August 2008
// by Stephen Chapman, Felgall Pty Ltd
// permission is granted to use this javascript provided that the below code is not altered

function contract_pw() {
	return window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth;
}

function contract_mouseX(evt) {
	return evt.clientX ? evt.clientX + (document.documentElement.scrollLeft || document.body.scrollLeft) : evt.pageX;
} 

function contract_mouseY(evt) {
	return evt.clientY ? evt.clientY + (document.documentElement.scrollTop || document.body.scrollTop) : evt.pageY;
} 

function contract_popUp(evt,oi) {
	if (document.getElementById) {
		var wp = contract_pw();
		dm = document.getElementById(oi);
		ds = dm.style;
		st = ds.visibility;
		
		if (dm.offsetWidth) ew = dm.offsetWidth;
		else if (dm.clip.width) ew = dm.clip.width;
		
		if (st == "visible" || st == "show") {
			ds.visibility = "hidden";
		} else {
			tv = contract_mouseY(evt) - 250;
			lv = contract_mouseX(evt) - (ew/4) - 500;
			if (lv < 2) lv = 2;
			else if (lv + ew > wp) lv -= ew/2;
			lv += 'px';
			tv += 'px';
			ds.left = lv; 
			ds.top = tv;
			ds.visibility = "visible";
		}
	}
}