Code:

<form name="jump">
<p align="center">
<select name="menu">
<option value="http://minesh.com">Minesh</option>
<option value="http://viprasys.org">VipraSys</option>
<option value="http://songs.pk">songs.pk</option>
</select>
<input type="button" onClick="location=document.jump.menu.options[document.jump.menu.selectedIndex].value;" value="GO">
</p>
</form>

To make modifications to the code just edit or add the example of the code given below

Code:

<option value="http://viprasys.org/vb/">VipraSys</option>

Simple Tutorial Enjoy...!!