<SCRIPT>
function submitProcess1(oForm)
{
  oForm.submit();
}

function submitProcess2(oForm)
{
  var oNewForm = oForm;
  var oNewField = document.createElement('INPUT');
  oNewField.type = 'hidden';
  oNewField.name = 'flag';
  oNewField.value = true;
  oNewForm.appendChild(oNewField);
  oNewForm.submit();
}
</script>
<form action="script.php">
  <input name="who_is" value="I am">
  <input type="button" onclick="submitProcess1(this.form);" value="1">
  <input type="button" onclick="submitProcess2(this.form);" value="2">
</form>

var oNewForm = oForm;