function pw() {return window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth}; 
function mouseX(evt) {return evt.clientX ? evt.clientX + (document.documentElement.scrollLeft || document.body.scrollLeft) : evt.pageX;} 
function mouseY(evt) {return evt.clientY ? evt.clientY + (document.documentElement.scrollTop || document.body.scrollTop) : evt.pageY} 
function popUp(evt,oi) {
	if (document.getElementById) {
		var wp = 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 = mouseY(evt) + 20; lv = mouseX(evt) - (ew/4);
			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";
			}
		}
	}