jquery - How can I cancelBubble for a drop down panel with a scroll bar? -

is possible use cancelbubble function dropdownpanel scroll bars? have issue when clicking on scroll bar scroll threw rows once mouse released results close. reading think need sort of cancelbubble event or stop propagation..

can done panel? have tried following still has not changed behavior. ideas appreciated tia

  <script type="text/javascript">       function cancelbubble(e) {           var evt = e ? e : window.event;           if (evt.stoppropagation) evt.stoppropagation();           if (evt.cancelbubble != null) evt.cancelbubble = true;       } </script>   <tr>         <td class="style7" colspan="2" align="left">             <asp:textbox id="npitextbox" runat="server" bordercolor="white"                  borderstyle="none" forecolor="white"                  style="color: #ffffff; background-color: #ffffff"></asp:textbox>         </td>             <asp:panel id="autocompletedropdownpanel" runat="server" font-size="medium"              horizontalalign="left" wrap="false" height="200px" scrollbars="vertical" cssclass="style101" onclick="cancelbubble" />     </tr>     <tr>