title: Adding "onclick" attribute to asp.net dropdownlist item
body: <p>I can add an attribute to items in a RadioButtonList item like so:</p>
  
  <pre><code>PaymentMethodDropDownList.Items[0].Attributes.Add("onclick", "javascript:showNoMethods();");
  PaymentMethodDropDownList.Items[1].Attributes.Add("onclick", "javascript:showCreditCardMethod();");
  PaymentMethodDropDownList.Items[2].Attributes.Add("onclick", "javascript:showSendPaymentMethod();");
  </code></pre>
  
  <p>However, when I try to add the attributes to a DropDownList control it doesn't seem to work.  I would expect it to be similar.</p>