var popUpWin=0;

function popUpWindow(URLStr, left, top, width, height, scrollbars)
{
	if(popUpWin)
  	{
		if(!popUpWin.closed) 
		{ 
			popUpWin.close(); 
		}
  	}
	  
	if (scrollbars == "") 
  	{ 
  		scrollbars="no"; 
	}
	
	popUpWin = open(URLStr, 'popUpWin', 'toolbar=no,location=no,directories=no,status=no,menub ar=no,scrollbars='+scrollbars+',resizable=no,copyhistory=yes,width='+width+',height='+height+',left='+left+', top='+top+',screenX='+left+',screenY='+top+'');
			
	}