function winpop(url){



    var w = screen.availWidth-10;
    var h = screen.availHeight-100;

    popup = window.open(url,'popup','screenX=0,screenY=0,left=0,top=0,menubar=yes,toolbar=yes,location=yes,status=yes,scrollbars=yes,resizable=yes,width='+w+',height='+h);




  }