求助一个简单问题

Question

<img src="http://community.csdn.net/logo/Images/eye001.gif" onclick=document.getElementById("div1").style.display=''>
<div id="div1" style="display:none">
<img src="http://images.csdn.net/upimgs/CSDN-ad120_360.GIF">
</div>

Answer 1

<img src="http://community.csdn.net/logo/Images/eye001.gif" onmouseover=document.getElementById("div1").style.display='' onmouseout=document.getElementById("div1").style.display='none'>
<div id="div1" style="display:none">
<img src="http://images.csdn.net/upimgs/CSDN-ad120_360.GIF">
</div>

Answer 2

还要改变层的位置才行。
在onmouseover的事件里加上：
document.getElementById("div1").style.pixelLeft=event.clientX;
document.getElementById("div1").style.pixelTop=event.clientY;