function smallwin(theURL)
{
  window.open(theURL, "smallwindow", "width=700,height=700,toolbar=no,location=no,directories=no,copyhistory=no,scrollbars=yes,resizable=yes");
}

function modelesswin(url,mwidth,mheight){
   pop = eval('window.open(url,"pop","width='+mwidth+'px,height='+mheight+'px,resizable=1,scrollbars=1")');
   pop.moveTo(200,200);
}

function validate_required(field,alerttxt)
{
  with (field)
    {
      if (value==null||value=="")
        {alert(alerttxt);return false}
      else {return true}
    }
}