This plugin turns properly formatted html forms into in-field labels.
This is integration with the http://fuelyourcoding.com/scripts/infield/
when the input field is focussed then label fade & entry begins in input field then label text disappered.
When clearing the field the label text reappears.
<form id="test" method="post" >
<p>
<label for="field_id">Label Text</label><br />
<input type="text" name="field_id" value="" id="field_id" placeholder="">
</p>
</form>