$(function() {
    banners();

    function banners() {
        var elm;
        $(".bannerselect li").click(function() {
            if (elm !== undefined) {
                elm.removeClass("selected");
                elm.find("input").removeAttr("checked");
            }
            elm = $(this);
            $("textarea[name='source']").val($(".banner_code", elm).html());
            elm.addClass("selected");
            elm.find("input").attr("checked", "checked");
        });
    }
});