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

function validate_supportform(thisform)
{
  with (thisform)
  {
    if (validate_required(visitor, "Please enter your name")==false) {visitor.focus();return false};
    if (validate_required(visitormail, "Please enter your Email")==false) {visitormail.focus();return false};
    if (validate_required(notes, "Please enter message")==false) {notes.focus();return false};
  }
}