Old ASP.NET Classic site(NETFramework 4) was working fine with this jQuery Plugin - https://github.com/andreyfedoseev/jquery-ocupload/blob/master/jquery.ocupload.js - page with this uploader worked outside ASP.NET.

But I rebuild this site and PopUp Windows with uploader I have placed inside ASP.NET form tag and place it on ASP.NET page.

After that this Uploader stop working. This Uploader has Submit function.

        submit: function () {
            if (this.onSubmit()) {

                $('input[type=hidden]', form).remove();

                $.each(options.params, function (key, value) {
                    form.append($(
                    '<input ' +
                        'type="hidden" ' +
                        'name="' + key + '" ' +
                        'value="' + value + '" ' +
                    '/>'
                ));
                });

                $('input[name=uploadtime]', form).val(getNTime());
                form.submit();

How to correct modify this submit function (where is correct place to add e.preventDefault()) and maybe need something modifying (additionally to EnableEventValidation="false") in ASP.NET?

On the screen below there is a wrong place, submit still don't working.