title: How to make ASP.Net custom validators produce an alert
body: <p>All ASP.Net client validation messages can be shown as an alert by setting the ShowMessageBox="True" property on the ValidationSummary control.</p>
  
  <p>This works fine for anything that happens on the client.</p>
  
  <p>For the custom validators that validate server-side I had <em>assumed</em> that what would happen is that when the page is returned to the browser, ASP.Net would inject some javascript to show the alert box. However this isnt the case.</p>
  
  <p>If you had relied on the message box to show detail and just have a * next to the erroneous field (as per my clients req's) then it wont work as intended.</p>
  
  <p>Does anyone have a solution for doing this? What I want is a way to possibly override the ValidationSummary control to inject javascript onto the page or something like this.</p>
  
  <p>Thanks in advance.</p>