JQuery simple implementation of web options carter effect

CSS :

        .clear{clear:both; height:0px; overflow:hidden;} 

        .tab{width:400px; font-size:12px;} 

        .tab_menu ul{padding:0px;margin:0px;} 

        .tab_menu li{list-style:none; display:block; float:left; 

            background:#C2CEFE; height:22px; line-height:22px; 

            padding: 0px 8px; margin-right:6px; border:#86B4CA 1px solid; 

        } 

        .box{width:400px; height:200px; overflow:hidden; border:#A8C9D9 1px solid; padding:10px 8px; } 

        .tab_menu ul li.selected{background:#dadada; cursor:pointer; } 

        .hide{display:none;} 

jQuery :

        $(function() { 

            var $menu_li = $("div.tab_menu ul li");  //Select the web page TAB 

            $menu_li.click(function(){ 

                $(this).addClass("selected") //The current <Li> Highlight < br / >
                        .siblings().removeClass("selected"); //Remove other peers <Li> 

                var index = $menu_li.index( $(this) ); //Find <Li> Index of child node 

                $("div.tab_box > div").eq(index).show() //DIV with index N is displayed 

                        .siblings().hide();            //The other tabs hide 

            }) 

        })  

html :