Fixing download image button using Jquery

Question

The download image button on my website is not working.

This is the jQuery code:

$("#download").click(function () {
    var img = $('#link').val();
    $.ajax({
        url: 'img.php',
        type: 'post',
        data: '',
        success: function (data, textStatus, jQxhr) {
            console.log(data);
            document.location.href = "data:image/jpg;base64," + data;
        },
        error: function (jqXhr, textStatus, errorThrown) {
            console.log(errorThrown);
        }
    });
});