I have a form, in the javascript onSubmit event i make an ajax call to load a kendo window

Js:

function onSubmit(){

    var window = $("#window").data("kendoWindow");
    window.refresh({
                    url: url
                }).open();
}

View:

@(Html.Kendo().Window() _
.Modal(True) _
.Visible(False) _
.Name("window") _
.Title("Window"))

and this works great, but when I click on a button inside the window and go to the javascript onClick event, if I try to instantiate the window again and access .data("kendoWindow"), I get undefined (not in $("#window")).

function onClickButton(e){
  var window = $("#window").data("kendoWindow"); //undefined in .data("kendoWindow")
      window.refresh({
        url: url
    }).open();
}