title: JQuery - Find closest textbox on dropdown change
body: <p>On the change of DropDown list, I'd like to use JQuery to find the closest / next Textbox.
  The Product textbox has a dynamic ID so I can't reference it using #Product, hence why I'd like to find it's ID dynamically:</p>
  
  <pre><code>&lt;div class="orderLineRow"&gt;
  @Html.DropDownList("Products")
  
  @Using Html.BeginCollectionItem("OrderLines")
      @Html.TextBoxFor(Function(model) model.Product)  
   End Using
  &lt;/div&gt;
  </code></pre>
  
  <p>The dropdown change:</p>
  
  <pre><code>$(function () {
      $("#Products").change(function () {
         ??
  
      });
  
  });
  </code></pre>