var popUpWin=0;
function popupWin(URLStr, width, height){
	if(popUpWin){
		if(!popUpWin.closed) popUpWin.close();
	}
	var win_name = 'popUpWin';
	var theWidth = window.screen.availWidth;
	var theHeight = window.screen.availHeight;
	
	// set left/top location of window
	if (width == null || width == ""){
		width = 265;
	}
	if (height == null || height == ""){
		height = 245;
	}
	var left = theWidth/2 - Number(width)/2;
	var top = theHeight/2 - Number(height)/2;
	
	popUpWin = open(URLStr, win_name, 'width='+String(width)+',height='+String(height)+',left='+String(left)+', top='+String(top)+',screenX='+String(left)+',screenY='+String(top)+',toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no');
	return(false);
}