function popup(thisUrl,thisWidth,thisHeight,thisTop,thisLeft) {
	  optionString = ('width=' + thisWidth + ',height=' + thisHeight + ',top=' + thisTop + ',left=' + thisLeft + ',toolbar=no, location=no, directories=no,status=no,menubar=no,resizable=yes,scrollbars=yes');
	  mainWin = window.open(thisUrl,"qr_win",optionString);
	  mainWin.opener = self;
	  mainWin.resizeTo(thisWidth, thisHeight);
	  mainWin.focus();
	}