Someone

          <label for="file.Game.GameID">$ResourceManager.Game:</label>
          <br />
          <select name="file.Game.GameID" id="file.Game.GameID">
            <option value="0" selected>Select a Game</option>
            #foreach($item in $games)
            <option value="$item.GameID">$item.Name</option>
            #end
          </select>
          <br />
          <br />
           $AjaxHelper.ObserveField("file.Game.GameID", 2, "fetchcategories.aspx", "category", "'value='+value")
          <span id="category">
            #parse("file/fetchcategories.vm")
          </span>
          $AjaxHelper.ObserveField("file.Category.CategoryID", 2, "fetchbrands.aspx", "brand", "'value='+value")
          <span id="brand">
            #parse("file/fetchbrands.vm")
          </span>