function popupWindow(winURL,winName,winWidth,winHeight) 
{
	iLeft = (window.screen.availWidth/2)-(winWidth/2);
	iTop = (window.screen.availHeight/2)-(winHeight/2);
	window.open(winURL,winName,
	"left=" + iLeft + ",top=" + iTop + ",width=" + winWidth + ",height=" + winHeight + ",toolbar=yes,scrollbars=yes,directories=no,status=no,menubar=no,resizable=yes,location=no");
	//return false;
}