simpel-upload-form

function submitForm(element, elmFiles, callback) {
    callback = callback || function () {}
    elmFiles = elmFiles || "";

    var form = document.getElementById(element);
    if (form) {
        var url = form.action;

        if (!url) {
            url = window.location.pathname;
        }
        var ajaxSetting = {
            type: 'POST',
            url: url,
            cache:false,
            success: function (data) {
                callback(data);

            },
            error: function (x, e) {
                if (x.status == 0) {
                    alert("You are offline!!\n Please Check Your Network.", "Error!");
                } else if (x.status == 404) {
                    alert("Requested URL not found.", "Error " + x.status);
                } else if (x.status == 500) {
                    var res = x.responseText;
                    alert(res);
                } else if (e == "parsererror") {
                    alert("Error.\nParsing JSON Request failed.", "Error!");
                } else if (e == "timeout") {
                    alert("Request Time out.", "Error!");
                } else {
                    alert("Unknow Error.\n" + x.responseText, "Error!");
                }
            }
        }

        form.onsubmit = function (ev, data) {
            ev.preventDefault();
            $(".help-block").remove();
            $(".has-error").removeClass("");
            if (elmFiles) {
                if (elmFiles instanceof Array) {
                    for (var i = 0; i < elmFiles.length; i++) {
                        $("#" + elmFiles[i]).remove();
                    }
                } else {
                    $("#" + elmFiles).remove();
                }
                var formData = new FormData($('#' + element)[0]);
                ajaxSetting.processData=false;
                ajaxSetting.contentType=false;

            } else {
                var formData = $(this).serialize();
            }

            ajaxSetting.data=formData;
            $.ajax(ajaxSetting);

        }
    }
}