I have a page with multiple text fields, each of which has an example for an initial value. I've added the appropriate code so that onFocus() the example is cleared away, and a blank field is left behind. Trouble is, I only want that to happen once, so that the field isn't cleared if the user attempts to edit what they wrote earlier. Anybody know of a way to do that with only a few lines of code? Here's my existing code:

<script language="JavaScript">
function clearField(fieldName) {
 fieldName.value = "";
// -->

<p>Person's Name: <input type="text" name="name" size="30"
value="John Smith" tabindex="2" onFocus="clearField(this)"></p>