Document dot ready function not working in UpdatePanel

 Document dot ready function not working in UpdatePanel

 $(document).ready(function () {

});
instead of  $(document).ready use below..

var prm = Sys.WebForms.PageRequestManager.getInstance();

    if (prm != null) {

        prm.add_endRequest(function (sender, e) {

            if (sender._postBackSettings.panelsToUpdate != null) {               

                document.getElementById("SearchBox").style.display = 'none';

                openFileInGrid();

            }

        });

    };