I'm trying to include a validator on a form launched by the ModalPopupExtender control found in the AJAX toolkit. This is an ASP.Net 2.0 web application.
Several articles that show how to do this, include this reference:
<asp:ScriptReference Assembly="Microsoft.Web.Preview"Name="PreviewScript.js" />
This is the article I've based my page on for testing. http://usefulaspnet.blogspot.com/2007/03/modal-popup-with-textbox-and-validator.html
The problem I'm running into is that the file cannot be found when the page tryies to open.
It turns out #1 is the correct answer.
All I had to do was make sure that the validators in the popup all were in the same validation group.