代码记录(一)

window.onload = function(){

    var xia = document.getElementById('xia');

    var shang = document.getElementById('shang');

    var html = document.getElementById('html');

        xia.onclick = function(){

            slids.ent();

        }

        shang.onclick = function(){

            slids.enet();

        }

}

var slids = {

    title:["男子跑步","女子跑步","男子足球","女子足球","男子篮球","女子篮球","男子网球","女子网球","男子羽毛球","女子羽毛球","男子自行车"],

    index:0,

    ent:function(){

        var _this = this;

        _this.index++;

        _this.index = _this.index>=_this.title.length-1?_this.title.length-1:_this.index;

        //    alert(_this.index);

        html.innerHTML = _this.title[_this.index];

        return false;

    },

    enet : function(){

        var _this = this;

        _this.index--;

        _this.index = _this.index<=0?0:_this.index;

        //    alert(_this.index);

        html.innerHTML = _this.title[_this.index];

        return false;

    }

}