Question

JavaScript代码求救，想做鼠标移入显示图片，移出隐藏

<script>
window.onload=function(){
var a1=document.getElementsByClassName("weizi");
var a2=document.getElementsByTagName("li")
var i=0;
for(i=0;i<a2.length;i++)
{
a2[i].onMouseOver=function()
{
a2[i].ClassName="tv";
}
this..ClassName="tv-1";
}
}
</script>

<div class="DaoHang">
<div class="nav" >
<ul class="weizi">
<li ><a href="#" style="color:#FFFFFF;">
<img src="img/1-4.jpg" width="25px" height="25px" class="tv">皇阿玛</a></li>
<li ><a href="#" style="color:#FFFFFF;">
<img src="img/1-4.jpg" width="25px" height="25px" class="tv">招娣</a></li>
<li ><a href="#" style="color:#FFFFFF;">
<img src="img/1-4.jpg" width="25px" height="25px" class="tv" >撸撸</a></li>
<li ><a href="#" style="color:#FFFFFF;">
<img src="img/1-4.jpg" width="25px" height="25px" class="tv" >三脚</a></li>
<li ><a href="#" style="color:#FFFFFF;">
<img src="img/1-4.jpg" width="25px" height="25px" class="tv" >老虎</a></li>
</ul>
</div>
</div>

Answer 1

<img src="" onmousemove="this.src='https://ss0.baidu.com/6ONWsjip0QIZ8tyhnq/it/u=3146244483,1982398836&fm=58'" onmouseout="this.src=''" width="80" height="80">

Answer 2

做一个div里面放入你想要显示内容,鼠标经过焦点div设置成显示属性，失去焦点div隐藏。

追问

那么我写的这段代码有木有问题