function checkform ( form )
{
if (form.firstname.value == "") {
    alert( "Please enter your First Name." );
    form.firstname.focus();
    return false ;
  }

  if (form.lastname.value == "") {
    alert( "Please enter your Last Name." );
    form.lastname.focus();
    return false ;
  }

  if (form.address.value == "") {
    alert( "Please enter your Address." );
    form.address.focus();
    return false ;
}

  if (form.city.value == "") {
    alert( "Please enter your City." );
    form.city.focus();
    return false ;
}
  if (form.state.value == "") {
    alert( "Please enter your State." );
    form.state.focus();
    return false ;
}
  if (form.zip.value == "") {
    alert( "Please enter your Zip." );
    form.zip.focus();
    return false ;
}
  if (form.phone.value == "") {
    alert( "Please enter your Phone Number." );
    form.phone.focus();
    return false ;
}
  return true ;
}