function clearForm(field) {
if (field.value == field.defaultValue) {
  field.value = "";
  }
  field.style.color="#333";
}

function checkForm(field) {
if (field.value == "") {
  field.value = field.defaultValue;
  field.style.color="#999";
  }
else {
  field.style.color="#333";
  }
}