title: How to scope a ValidationGroup
body: <p>I have 2 buttons, <code>costButton</code> and <code>detailsButton</code>, and one textbox (with associated <code>RequiredFieldValidator</code>) on my aspx page. <code>costButton</code> button and the textbox belong to ValidationGroup <code>costValGroup</code>.  </p>
  
  <p><code>detailsButton</code> doesnt belong to any validation group. When it is clicked, it triggers the validators in <code>costValGroup</code>, <strong>which I want to avoid</strong>.  </p>
  
  <p>Here's the client-side code I found in asp's<br>
  ValidationGroup => WebResource.axd</p>
  
  <pre><code>function IsValidationGroupMatch(control, validationGroup) {
      if ((typeof(validationGroup) == "undefined") || (validationGroup == null)) {
          return true;
      }
      ...
  }
  </code></pre>
  
  <p>Looks like if a validation group is not specified, it will validate all the validators.<br>
  How can I limit a validation group to itself?</p>