How To Wait On The __dopostback Method To Complete In Javascript?

I am using the __doPostBack method to refresh the UpdatePanel in javascript. I just want to wait for the update panel to get updated and then execute the subsequent javascript code

Solution 1:

Use the Sys.WebForms.PageRequestManager endRequest event:

<script type="text/javascript" language="javascript">
    function clearPostBack() {
        $get('__EVENTTARGET').value = $get('__EVENTARGUMENT').value = '';
        Sys.WebForms.PageRequestManager.getInstance().remove_endRequest(clearPostBack);

        // TODO: anything you want after __doPostBack
    }

    function myPostBack(eventTargetUniqueId, eventArgument) {
        Sys.WebForms.PageRequestManager.getInstance().add_endRequest(clearPostBack);
        __doPostBack(eventTargetUniqueId, eventArgument);
    }
</script>