How to update only the part of page
<p>I have several combo boxes and labels.  when a user select any item from the combo box, the corresponding value will be retrieved from database and will be shown on the label. I have done these part successfully. </p>

<p>But my query is, when I select any item from the combo box, the whole page posts back to the server (AutoPostBack set to <strong><em>True</strong>.</em>) </p>

<p>is it possible to post back only a part of page not the whole page (i.e. only combo box controls may be posted back to server instead of whole page)?</p>
