轮播图1

    
    
    



    

        

            
            
            
            
            
            
            
        
        

            
            
            
            
            
        
        
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carousel.js

// 下一页
function next_pic(wrap) {
    index++;
    if (index > 4) {
        index = 0;
    }
    showCurrentDot(wrap);
    var newLeft;
    if (wrap.style.left === "-3600px") {
        newLeft = -1200;
    } else {
        newLeft = parseInt(wrap.style.left) - 600;
    }
    wrap.style.left = newLeft + "px";
}
// 上一页
function prev_pic(wrap) {
    index--;
    if (index < 0) {
        index = 4;
    }
    showCurrentDot(wrap);
    var newLeft;
    if (wrap.style.left === "0px") {
        newLeft = -2400;
    } else {
        newLeft = parseInt(wrap.style.left) + 600;
    }
    wrap.style.left = newLeft + "px";
}
// 定时器 --- 自动播放
var timer = null;

function autoPlay(wrap) {
    timer = setInterval(function() {
        next_pic(wrap);
    }, 2000);
}

// 圆点导航
var index = 0;
var dots = document.getElementsByTagName("span");
// 显示当前是第几张图片
function showCurrentDot(wrap) {
    for (var i = 0, len = dots.length; i < len; i++) {
        dots[i].className = "";
    }
    dots[index].className = "on";
}
//最开始和最后的照片修整
for (var i = 0, len = dots.length; i < len; i++) {
    (function(i) {
        var wrap = document.querySelector(".wrap");
        dots[i].onclick = function() {
            var dis = index - i;
            if (index == 4 && parseInt(wrap.style.left) !== -3000) {
                dis = dis - 5;
            }
            //和使用prev和next相同，在最开始的照片5和最终的照片1在使用时会出现问题，导致符号和位数的出错，做相应地处理即可
            if (index == 0 && parseInt(wrap.style.left) !== -600) {
                dis = 5 + dis;
            }
            wrap.style.left = (parseInt(wrap.style.left) + dis * 600) + "px";
            index = i;
            showCurrentDot(wrap);

        }
    })(i);
}

function init() {
    var wrap = document.querySelector(".wrap");
    var next = document.querySelector(".arrow_right");
    var prev = document.querySelector(".arrow_left");
    // 当鼠标点击上下箭头
    next.onclick = function() {
        next_pic(wrap);
    }
    prev.onclick = function() {
            prev_pic(wrap);
        }
        //启动定时器
    autoPlay(wrap);
    // 鼠标滑过 取消自动播放
    var container = document.querySelector(".container");
    container.onmouseenter = function() {
        clearInterval(timer);
    }
    container.onmouseleave = function() {
        autoPlay(wrap);
    }
}
window.addEventListener('load', init, false);

源码地址：
链接：https://pan.baidu.com/s/1nHGEGu-T6uvVWHtfPMqViA
提取码：l8kx