html图片向上无缝滚动代码

Question

head>
<title>图片滚动 </title>
<style>
#div1
{position:relative;width:650px;height:210px;overflow:hidden;
}
#div2{position:absolute;}
li{float:left;list-style-type:none;padding:5px;}
img{border:none;}
#div2 li a:hover{top:-10px;}
a{position:relative;}
</style>
<script>
window.onload=function()
{
var odiv2=document.getElementById('div2');
var ali=odiv2.getElementsByTagName('li');
var aspeed=-5;
var timer=null;
odiv2.innerHTML+=odiv2.innerHTML;
odiv2.style.width=ali[0].offsetWidth*ali.length+'px';
odiv2.onmouseover=function(){clearInterval(timer);};
function a()
{
timer=setInterval(function()
{
odiv2.style.left=odiv2.offsetLeft+aspeed+'px';
if (odiv2.offsetLeft<-odiv2.offsetWidth/2)
{
odiv2.style.left='0px';
}
},30);};
odiv2.onmouseout=a;
a();
}
</script>

在哪里修改可以修改方向，我想向上滚动
麻烦知道的快点回答我

Answer 1

向上：程序代码
<div id=demo style="overflow:hidden; width:128px; height:300px;">
<div id=demo1>
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br>
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br>
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br>
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br>
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br>
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br>
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br>
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br>
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br>
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br>
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br>
</div>
<div id=demo2></div>
</div>
<script language="javascript">
var speed=30
demo2.innerHTML=demo1.innerHTML
function Marquee(){
if(demo2.offsetTop-demo.scrollTop<=0)
demo.scrollTop-=demo1.offsetHeight
else{
demo.scrollTop++
}
}
var MyMar=setInterval(Marquee,speed)
demo.onmouseover=function() {clearInterval(MyMar)}
demo.onmouseout=function() {MyMar=setInterval(Marquee,speed)}
</script>

向下：程序代码
<div id=demo style="overflow:hidden; width:128px; height:300px;">
<div id=demo1>
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br>
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br>
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br>
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br>
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br>
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br>
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br>
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br>
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br>
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br>
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br>
</div>
<div id=demo2></div>
</div>
<script language="javascript">
var speed=30
demo2.innerHTML=demo1.innerHTML
demo.scrollTop=demo.scrollHeight
function Marquee(){
if(demo1.offsetTop-demo.scrollTop>=0)
demo.scrollTop+=demo2.offsetHeight
else{
demo.scrollTop--
}
}
var MyMar=setInterval(Marquee,speed)
demo.onmouseover=function() {clearInterval(MyMar)}
demo.onmouseout=function() {MyMar=setInterval(Marquee,speed)}
</script>

向左：程序代码
<div id=demo style="overflow:hidden;height:100px;width:300px;"><table align=left
cellpadding=0 cellspace=0 border=0><tr><td id=demo1 valign=top><img src="gfjs.gif"><img
src="bxtt.gif"><img src="bzjd.gif"><img src="gfjs.gif"><img src="bxtt.gif"><img
src="bzjd.gif"></td><td id=demo2 valign=top></td></tr></table></div>
<script>
var speed=30
demo2.innerHTML=demo1.innerHTML
function Marquee(){
if(demo2.offsetWidth-demo.scrollLeft<=0)
demo.scrollLeft-=demo1.offsetWidth
else{
demo.scrollLeft++
}
}
var MyMar=setInterval(Marquee,speed)
demo.onmouseover=function() {clearInterval(MyMar)}
demo.onmouseout=function() {MyMar=setInterval(Marquee,speed)}
</script>

向右：程序代码
<div id=demo style="overflow:hidden;height:100px;width:300px;"><table align=left
cellpadding=0 cellspace=0 border=0><tr><td id=demo1 valign=top><img src="gfjs.gif"><img
src="bxtt.gif"><img src="bzjd.gif"><img src="gfjs.gif"><img src="bxtt.gif"><img
src="bzjd.gif"></td><td id=demo2 valign=top></td></tr></table></div>
<script>
var speed=30
demo2.innerHTML=demo1.innerHTML
demo.scrollLeft=demo.scrollWidth
function Marquee(){
if(demo.scrollLeft<=0)
demo.scrollLeft+=demo2.offsetWidth
else{
demo.scrollLeft--
}
}
var MyMar=setInterval(Marquee,speed)
demo.onmouseover=function() {clearInterval(MyMar)}
demo.onmouseout=function() {MyMar=setInterval(Marquee,speed)}
</script>

Answer 2

function a()
{
   timer=setInterval(function()    
     {
      odiv2.style.left=odiv2.offsetLeft+aspeed+'px';
      if (odiv2.offsetLeft<-odiv2.offsetWidth/2)
      {
       odiv2.style.left='0px';
       }
       },30);};
   odiv2.onmouseout=a;
   a();
   }

这个地方,修改为odiv2.style.top,涉及到left都改为top

 odiv2.style.width=ali[0].offsetWidth*ali.length+'px';
这个地方应该该文offisetHeight

向上滚动是修改top值.

追问

可不可以再具体一点……我今天没用成功

追答

你需要获取图片的高度然后改变图片的所处位置也就是top值,通过定时器实现向上滚动的效果

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