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

function validate_form(thisform)
{
with (thisform)
  {
  if (validate_required(email,"Email must be filled out!")==false)
  {email.focus();return false;}
  }
}

  function clearText (el) {
    if (el.defaultValue == el.value) el.value = "";
  }

  function restoreText (el) {
    if (el.value == "") el.value = el.defaultValue;
  }