title: AjaxControlToolkit, ComboBox style
body: <p>I am with a little problem with the arrow image of a ComboBox control (AjaxControlToolkit).</p>
  
  <p>I define this style:</p>
  
  <pre><code>.WindowsStyle .ajax__combobox_inputcontainer .ajax__combobox_buttoncontainer button
  {
      margin: 0;
      padding: 0;
      background-image: url(../icons/windows-arrow.gif);
      background-position: top left;
      border: 0px none;
      height: 21px;
      width: 21px;
  }
  </code></pre>
  
  <p>I set this style on combobox, but the control are showing the border of the textbox before the arrow:</p>
  
  <p><img src="https://i.stack.imgur.com/zar28.png" alt="http://img190.imageshack.us/img190/9830/combobox.png)"></p>
  
  <p>Look <a href="http://www.asp.net/AJAX/AjaxControlToolkit/Samples/ComboBox/ComboBox.aspx" rel="nofollow noreferrer">here</a>, the border aren't showing!</p>
  
  <p>How can I hide this border?</p>