Auto select in input?

Hello people
how to put the machine to the chosen option, I suppose there is a form

<p><b>text:</b><br>
 <input type="radio" name="internet" value="expl"> Internet Explorer<br>
 <input type="radio" name="internet" value="opera"> Opera<br>
 </p>

how to make so when you load the page chosen Internet Ex.
Ps . I don't want his browser I need to machine out the first option from the list !