js定时

    var name_list = new Array( "张三","李四","王五");
    var length = name_list.length;
    var Intervalid = setInterval("demo()",500);
    function demo()
    {
        if(length<0)
        {
            length = name_list.length;
            //clearInterval(Intervalid); //取消定时
        }


        $("#demo_show").html(name_list[length]);
        length--;
    }