function clearValue(object) {
  if (object.value == object.defaultValue) {
    object.value = "";
  }
}

function restoreValue(object) {
  if (object.value === "") {
    object.value = object.defaultValue; 
  }
}

function toggle(object) {
  var className = object.className;
  
  if (className === "") {
    object.className = "active";
  } else if (className == "text") {
    object.className = "text active";
  } else if (className == "text active") {
    object.className = "text";
  } else {
    object.className = "";
  }
}