var chat_animation_speed = .3;
    var chat_ease = 'swing';
    $.cache_elements.social.enlarge_chat.on('click' ,function() {

        $.cache_elements.social.enlarge_chat.css({"display":"none"});
        var chat_window = $.cache_elements.social.chat_window;
        var chat_display = $.cache_elements.social.chat_display;
        var chat_height = 200;

        TweenLite.to([chat_window,chat_display],chat_animation_speed,{css:{height:'+='+chat_height},ease:chat_ease,
            onComplete: function() {
                chat_display.mCustomScrollbar("update");
                chat_display.mCustomScrollbar("scrollTo","bottom");
                $.cache_elements.social.maximize_chat.css({'display':'block'});
            }
        });
    });