Question

    <asp:ScriptManager ID="ScriptManager1" runat="server">
            <Services>
                <asp:ServiceReference Path="WebService.asmx" />
            </Services>
   </asp:ScriptManager> 
   <script type="text/javascript">
            WebService.GetUpdate("hhh",OnComplete, OnTimeout, OnError);
    </script>

this code is working fine, but when I change the Path to an external webservices, it give me an error, the class name is not defined. can someone help me out, thanks
the changed one is

   <asp:ScriptManager ID="ScriptManager1" runat="server">
            <Services>
                <asp:ServiceReference Path="http://mysite/WebService.asmx" />
            </Services>
   </asp:ScriptManager> 
   <script type="text/javascript">
            WebService.GetUpdate("hhh",OnComplete, OnTimeout, OnError);
    </script>

Answer 1

Make a call to the local server, and have the server make the call to the external web service. This is allowed.