Confirmation dialog at runtime in asp.net
<p>I have a simple content management system that stores pages by Pagename and Version. After clicking on Save, my code (server side) checks for the existence of Pagename/Version. </p>

<p>If it exists I would like to display a confirmation dialog box, which asks the user to confirm whether or not the current Pagename/Version should be replaced. </p>

<p>What is the easiest way to accomplish this?  Thanks. </p>
