In a form, I would like the input:text to fill the remain space after the label to the form is left and right justified.

The label have number of characters so I can't set a fixed width on the label.

Code example:

<fieldset>
<legend>User Info</legend>
<p><label>First Name :</label><input type="text"...></p>
<p><label>Last Name : </label><input type="text"...></p>
<p><label>Completed Email Address :</label><input type="text"...></p>
</fieldset>

How can I style the input to fill the remaining space after the text.

Thanks.