原生态图片轮播

    var curIndex = 0;
    //时间间隔 单位毫秒
    var timeInterval = 5000;
    var arr = new Array();
    arr[0] = "Images/addimg/adv_meitu_1.jpg";
    arr[1] = "Images/addimg/adv_meitu_2.jpg";
    arr[2] = "Images/addimg/adv_meitu_3.jpg";
    arr[3] = "Images/addimg/adv_meitu_4.jpg";
    setInterval(changeImg, timeInterval);
    function changeImg() {
        var obj = document.getElementById("img");
        if (curIndex == arr.length - 1) {
            curIndex = 0;
        }
        else {
            curIndex += 1;
        }
        obj.src = arr[curIndex];
    }