function popup(url,name,w,h){xPos=(screen.width)?(screen.width-w)/2:0;yPos=(screen.height)?(screen.height-h)/2:0;attr='height='+h+',width='+w+',top='+yPos+',left='+xPos+',scrollbars=yes,resizable=yes';win=window.open(url,name,attr);}