Load new page on postback
<p>I have a master page that has a usercontrol on the left side of the page with a dropdown. When the user selects a value from the dropdown I need to load a different aspx page.  The new page has a similar (but not the same) looking usercontrol on the left and different content on the right.  How can I do this? Also, when the new page is loaded the dropdown must remember its selection.  </p>
