单击模式窗体提交按钮不起作用

Question

I created a modal dropdown form with four dropdown lists, with the fourth dropdown containing a link to a document to display once user clicks the submit button. All four dropdowns work fine, however when clicking the submit button the document does not display. The form simply continues to display. Any help is appreciated.

        var selectedOptions = {};

        $('#link1').on('change', function () {
            var a = $(this).val();
            selectedOptions['1'] = a;
            selectedOptions['2'] = a;
            selectedOptions['3'] = a;
            if (a !== '') {
                for (var i = 0; i < dataSecondSelect[a].length; i++) {
                    $('#link2').append($("<option></option>")
                            .attr("value", dataSecondSelect[a][i])
                            .text(dataSecondSelect[a][i]));
                }
            }
        });

        $('#link2').on('change', function () {
            var a = $(this).val();
            selectedOptions['1'] = a;
            selectedOptions['2'] = a;
            selectedOptions['3'] = a;
            if (a !== '') {
                for (var i = 0; i < dataThirdSelect[a].length; i++) {
                    $('#link3').append($("<option></option>")
                            .attr("value", dataThirdSelect[a][i])
                            .text(dataThirdSelect[a][i]));
                }
            }
        });
        $('#link3').on('change', function () {
            var a = $(this).val();
            selectedOptions['1'] = a;
            selectedOptions['2'] = a;
            selectedOptions['3'] = a;
            if (a !== '') {
                for (var i = 0; i < dataFourthSelect[a].length; i++) {
                    $('#link4').append($("<option></option>")
                            .attr("value", dataFourthSelect[a][i].link)
                            .text(dataFourthSelect[a][i].form));
                }
            }
        });

    $('#clickButton').on('click', function () {
        var error = false;
        $(".error").remove();
        $(".validation-error").removeClass('validation-error');
        $('#myModal select').each(function () {
            // validate first
            if ($(this).val() === "") {
                var _message = "Please select an option";
                $(this).addClass('validation-error');
                $(this).after($('<div class="error"></div>').text(_message));
                error=true;
            }
        });

        if (error) { return; }
        // form is now validated so get the link
        var _index = $("#link4").val();
        var _form = dataFourthSelect[_index][0].link;
        resetForm($(this)[0]);
        $('#myModal').modal('hide');
        openDoc(_form);

    });

    function resetForm(e) {
        $(".error").remove();
        $(".validation-error").removeClass('validation-error');
        e.form.reset();
    }

</script>

Answer 1

while going through your given code, i noticed the #link4 does not exists.

so the line var _index = $("#link4").val(); will return undefined which will subsequently fails the following line of code

var _form = dataFourthSelect[_index][0].link;

hope this helps.