$(document).ready(function() {

    _animate_banner();

    $('textarea.expanding').autogrow();
});

function _animate_banner() {

    var bg_top = $('.banner').css('top');

    var bg_img = $('.container').css('background-image');
    var bg_img = bg_img.replace(/"/g,"").replace(/url\(|\)$/ig, "");

    $('.banner').hide();
    $('.banner').css({'top':0});

    $('<img/>').attr('src', bg_img).load(function() {
        $('.banner').show();
        $('.banner').animate({
            top: '+='+bg_top
        }, 1000, function() {

        });
    });
}