function winPop(target, myW, myH, nm)
{	
	myleft = ((screen.width - myW) / 2);
	mytop = ((screen.height - myH) / 2);	
	window.open(target, nm, 'width='+myW+',height='+myH+',scrollbars=no,resizable=no,menubar=0,toolbar=0,status=0,location=0,directories=0,left='+myleft+',top='+mytop);
}