Help with drop down menu hyperlinks

[MDanz]

how do i get this code working so when i click and item it goes to the page in the value.

 <select name="Menu" >
<option value="http:www.fdsaf.com/index.php">Main Page</option>
<option value="<?php 

$userz = $_SESSION['username'];

echo "http:www.asfdaf.com/ustack.php?search=$userz&submit=Go!";
?>">User Stacks</option>
<option value="http:www.asdfasdf.com/stacker.php">Add Webpage</option>
<option value="http:www.sdfas.com/uimage.php">Add Image</option>
<option value="http:www.asdfaf.com/search.php">Traditional Search</option>
<option value="http:www.asfasfd.com/sbs.php">Frequently Asked Questions</option>
<option value="http:www.sfdsasfd.com/contact.php">Contact Us</option>
<option value="http:www.sfdf.com/about.php">About</option>


</select>