js 定时器: js控制图片定时切换不限制数_js

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<body>
<div id="ImageDiv" style="overflow:hidden;height:253px;width:410px;">
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</div>
<script>
var speed=3000;
var imgObj=document.getElementById("ImageDiv").getElementsByTagName("p");
var imgNum=imgObj.length;
var mm=0;
var ImgTurn=function()
{
    if(mm==imgNum)
{
    mm=0;
}
imgObj[mm].style.display="block";
if(mm==0)
{
     imgObj[imgNum-1].style.display="none";
}
else
{
     imgObj[mm-1].style.display="none";
}
mm++;
}
var myTurn=setInterval(ImgTurn,speed);
//鼠标移上时清除定时器达到滚动停止的目的
document.getElementById("ImageDiv").onmouseover=function() {clearInterval(myTurn);}
//鼠标移开时重设定时器
document.getElementById("ImageDiv").onmouseout=function(){myTurn=setInterval(ImgTurn,speed)};
</script>
</body>
</html>
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