jquery怎么添加指定标签到某值之后

<ul class="a" v=1">
<li>abc</li>
<li>abc</li>
<li>abc</li>
</ul>
<ul class="a" v=2">
<li>abc</li>
<li>abc</li>
<li>abc</li>
</ul>
<ul class="a" v=3">
<li>abc</li>
<li>abc</li>
<li>abc</li>
</ul>
<a href="javascript:void(0)" class="two">添加分类</a>

&(document).ready(function(){
$('.two').click(function(){
var addstr='';
addstr+="<ul class=\"a\">"
addstr+="<li>abc</li>"
addstr+="<li>abc</li>"
addstr+="<li>abc</li>"
addstr+="</ul>"
$(addstr).insertAfter();//这里我想添加到V=1之后，该怎么写？？？
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