File Upload By JQuery

How to start uploads with a button click

 we can start uploads files on the click of a button 

$(function () {

    $('#fileupload').fileupload({

        dataType: 'json',

        add: function (e, data) {

            data.context = $('<button/>').text('Upload')

                .appendTo(document.body)

                .click(function () {

                    data.context = $('<p/>').text('Uploading...').replaceAll($(this));

                    data.submit();

                });

        },

        done: function (e, data) {

            data.context.text('Upload finished.');

        }

    });

});