No you don't have to name the option tags!
The original code is right. You need to place the select in a form that will be submitted, and send the selected value to the server.
<form action=myScript.php method=POST>
<select name="menu1" >
<option value="www.site1.com">google</option>
<option value="www.site2.com">metu</option>
<option value="www.site3.com">mynet</option>
<option value="www.site4.com">asa</option>
</select>
<input type=Submit>
</form>
On the server, you'll need to create a file 'myScript.php' it might say:
<?php
echo 'You selected '.$_POST['menu1'];
?>
the Javascript call onChange="MM_jumpMenu('parent',this,0)"
is calling a javascript function, one the probably changes the window location without submitting values to a server.
