jQuery dynamic file input label

file-input-label.js

var fileInput = (function($) {

    var selector = 'input[type="file"]';

    $(selector).on('change', modifyLabel);

    function modifyLabel(event) {
        var fileName = '';
        var id = $(this).attr('id');
        var label = $('label[for="'+ id +'"]');

        if (this.files && this.files.length > 1)
            fileName = this.files.length + ' ' + 'files selected';
        else
            fileName = event.target.value.split('\\').pop();

        if (fileName)
            label.text(fileName);
    }

})(jQuery);