var popUpWin=0;
function popUpWindow(PageURL, WinName, Width, Height, Scrollbar, Resize)
{
	if (Width==0) { Width = screen.availWidth; }
	if (Height==0) { Height = screen.availHeight; }
	Left = (screen.availWidth) ? (screen.availWidth-Width)/2 : 0;
	Top  = (screen.availHeight) ? (screen.availHeight-Height)/2 : 0;
	Positions = 'height='+Height+',width='+Width+',top='+Top+',left='+Left;
	Features = Positions+','+'scrollbars='+Scrollbar+',resizable='+Resize+',toolbar=no,location=no,directories=no,status=no,menubar=no,copyhistory=yes';
	if (popUpWin) {
		if (!popUpWin.closed) popUpWin.close();
	}
	popUpWin = window.open(PageURL, WinName, Features);
	if (popUpWin) {
		popUpWin.focus();
	}
}