How to remove this URL DATA 64 and leave normal url file

When I upload an image, it adds a sequence of letters, numbers, and characters in the URL. I would like to know how do I change this, type, rather than appears this much of characters, simply appear the link of the image.

Here is the JavaScript code I'm using:

$(document).on('change', '#image-upload', function(evt) {
    var files = evt.target.files; // FileList object

    // Loop through the FileList and render image files as thumbnails.
    for (var i = 0, f; f = files[i]; i++) {

        // Only process image files.
        if (!f.type.match('image.*')) {
            continue;
        }

        var reader = new FileReader();

        // Closure to capture the file information.
        reader.onload = (function(theFile) {
            return function(e) {
                // Render thumbnail.
                var span = document.createElement('span');
                span.innerHTML =
                        '<a href="javascript:;" class="add-image"><img width="100px" height="100px" class="image-thumb" src="' + e.target.result + '" title="' + escape(theFile.name) + '"/></a>'
                        ;
                $("#memes-custom").append(span);
            };
        })(f);

        // Read in the image file as a data URL.
        reader.readAsDataURL(f);
    }
});