window.onload = function ()
{
var obox = document.getElementById("box");
var oList = obox.getElementsByTagName("ul")[0];
var aImg = obox.getElementsByTagName("img");
var timer = playTimer = null;
var index = i = 0;
var bOrder = true;
var aTmp = [];
//生成数字按钮
for (i = 0; i < aImg.length; i++)
{
aTmp.push("<li>" + (i + 1) + "</li>")
}
//插入元素
var oCount = document.createElement("ul");
oCount.className = "count"
oCount.innerHTML = aTmp.join("");
obox.appendChild(oCount);
//初始化状态
var aBtn = obox.getElementsByTagName("ul")[1].getElementsByTagName("li");
aBtn[index].className = "current";
//按钮点击切换
for (i = 0; i < aBtn.length; i++)
{
aBtn[i].index = i;
aBtn[i].onclick = function ()
{
index = this.index;
for (i = 0; i < aBtn.length; i++) aBtn[i].className = "";
this.className = "current";
startMove(-(this.index * aImg[0].offsetHeight))
}
}
//烈火網 lieｈｕｏ.nｅt 欢迎复制,拒绝恶意采集 ｌｉｅｈｕｏ．ｎｅｔ
//鼠标移入展示区停止自动播放
obox.onmouseover = function ()
{
clearInterval(playTimer)
};
//鼠标离开展示区开始自动播放
obox.onmouseout = function ()
{
autoPlay()
};
//页面加载即调用自动播放
obox.onmouseout();
//自动播放函数
function autoPlay()
{
playTimer = setInterval(function ()
{
bOrder ? index++ : index--;
index == aBtn.length - 1 && (bOrder = false);
index == 0 && (bOrder = true);
aBtn[index].onclick();
startMove(-(index * aImg[0].offsetHeight))
}, 3000)
}
function startMove(iTarget)
{
clearInterval(timer);
timer = setInterval(function ()
{
doMove(iTarget)
}, 30)
}
function doMove (iTarget)
{
var iSpeed = (iTarget - oList.offsetTop) / 10;
iSpeed = iSpeed > 0 ? Math.ceil(iSpeed) : Math.floor(iSpeed);
oList.offsetTop == iTarget ? clearInterval(timer) : oList.style.top = oList.offsetTop + iSpeed + "px"
}
};