var dom=(document.getElementById);
var ie = (document.all) ? 1 : 0
var screenWidth = screen.width;
var screenHeight = screen.height;    
function openWin(url, winName, w, h, wTop, wLeft) {  
	if (!w) var w=720;
	if (!h) var h=455;  
	// valign center if not given or 0
	if (!wTop) var wTop= ( (screenHeight - (h+50)) / 2) - 50; // wTop = document.body.scrollTop+50;    
	// align center if not given or 0
	if (!wLeft) var wLeft =  (screenWidth - (w+50)) / 2;  
	if (!winName) var winName="mywin"; 
	window.open(url,winName,'resizable=1,scrollbars=1,width='+w+',height='+h+',top='+wTop+',left='+wLeft+',directories=0,location=0,menubar=0,status=0,toolbar=1')
}