<div style="float:left;border:1px solid green">
<a href="javascript:void(0)" onclick="document.getElementById('DispDiv').innerHTML='1'">A</a><br>
<a href="javascript:void(0)" onclick="document.getElementById('DispDiv').innerHTML='2'">B</a><br>
<a href="javascript:void(0)" onclick="document.getElementById('DispDiv').innerHTML='3'">C</a>
</div>
<div id="DispDiv" style="border:1px solid red"></div>
追问能否加您QQ号详细说一下
追答代码我已经给你写出来了,将代码复制另存为:aaaa.html
运行即可知道答案啊!