Show update progress model inside trigger in asp.net

//////html

<asp:UpdateProgress ID="UpdWt" runat="server" DisplayAfter="1" AssociatedUpdatePanelID="UpdMaster">

            <ProgressTemplate>

                <div class="overlayWait" align="center">

                    <div class="textoverlayWait">

                        <i class="fa fa-clock-o" style="left: 10px; position: absolute; top: 2px;"></i>

                        <img src="img/wait.gif">

                        <div style="width: 130px;">

                            Please Wait <span id="loadspn">.</span>

                        </div>

                    </div>

                </div>

            </ProgressTemplate>

        </asp:UpdateProgress>

///////// JS

<script type="text/javascript">

            window.onsubmit = function () {

                if (Page_IsValid) {

                    var updateProgress = $find("<%= UpdWt.ClientID %>");

                    window.setTimeout(function () {

                        updateProgress.set_visible(true);       

                    }, 100);

                }

            }

      

        </script>