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<div nid="n_0_1_0_2_1" id="rightCon">
<h1 nid="n_0_1_0_2_1_0">重要公告</h1>
<ul nid="n_0_1_0_2_1_1">
<li nid="n_0_1_0_2_1_1_0">
<span nid="n_0_1_0_2_1_1_0_0" class="time">[2010-12-02]</span><a nid="n_0_1_0_2_1_1_0_1" href="" target="_blank" title="">关于的通知</a>(阅读<span nid="n_0_1_0_2_1_1_0_2" class="FF0000">175</span>次)
</li>
<li nid="n_0_1_0_2_1_1_1"><span nid="n_0_1_0_2_1_1_1_0" class="time">[2010-12-02]</span><a nid="n_0_1_0_2_1_1_1_1" href="" target="_blank" title="">关于的通知</a>(阅读<span nid="n_0_1_0_2_1_1_1_2" class="FF0000">185</span>次)
</li>
<li nid="n_0_1_0_2_1_1_2"><span nid="n_0_1_0_2_1_1_2_0" class="time">[2010-12-01]</span><a nid="n_0_1_0_2_1_1_2_1" href="" target="_blank" title="">公告</a>(阅读<span nid="n_0_1_0_2_1_1_2_2" class="FF0000">232</span>次)
</li>
</ul>
</div>
<li nid="n_0_1_0_2_1_1_0">
<span nid="n_0_1_0_2_1_1_0_0" class="time">[2010-12-02]</span><a nid="n_0_1_0_2_1_1_0_1" href="" target="_blank" title="">关于的通知</a>(阅读<span nid="n_0_1_0_2_1_1_0_2" class="FF0000">175</span>次)
</li>
<li nid="n_0_1_0_2_1_1_1"><span nid="n_0_1_0_2_1_1_1_0" class="time">[2010-12-02]</span><a nid="n_0_1_0_2_1_1_1_1" href="" target="_blank" title="">关于的通知</a>(阅读<span nid="n_0_1_0_2_1_1_1_2" class="FF0000">185</span>次)
</li>
<li nid="n_0_1_0_2_1_1_2"><span nid="n_0_1_0_2_1_1_2_0" class="time">[2010-12-01]</span><a nid="n_0_1_0_2_1_1_2_1" href="" target="_blank" title="">公告</a>(阅读<span nid="n_0_1_0_2_1_1_2_2" class="FF0000">232</span>次)
</li>
var str = '<div nid="n_0_1_0_2_1" id="rightCon">\
<h1 nid="n_0_1_0_2_1_0">重要公告</h1>\
<ul nid="n_0_1_0_2_1_1">\
<li nid="n_0_1_0_2_1_1_0">\
<span nid="n_0_1_0_2_1_1_0_0" class="time">[2010-12-02]</span><a nid="n_0_1_0_2_1_1_0_1" href="" target="_blank" title="">关于的通知</a>(阅读<span nid="n_0_1_0_2_1_1_0_2" class="FF0000">175</span>次)\
</li>\
<li nid="n_0_1_0_2_1_1_1"><span nid="n_0_1_0_2_1_1_1_0" class="time">[2010-12-02]</span><a nid="n_0_1_0_2_1_1_1_1" href="" target="_blank" title="">关于的通知</a>(阅读<span nid="n_0_1_0_2_1_1_1_2" class="FF0000">185</span>次)\
</li>\
<li nid="n_0_1_0_2_1_1_2"><span nid="n_0_1_0_2_1_1_2_0" class="time">[2010-12-01]</span><a nid="n_0_1_0_2_1_1_2_1" href="" target="_blank" title="">公告</a>(阅读<span nid="n_0_1_0_2_1_1_2_2" class="FF0000">232</span>次)\
</li>\
</ul>\
</div>';
var reg = /<ul[^>]*?>(.*?)<\/ul>/;
alert(str.match(reg)[1]);
var str = '<div nid="n_0_1_0_2_1" id="rightCon">\n\
<h1 nid="n_0_1_0_2_1_0">ÖØÒª¹«¸æ</h1>\n\
<ul nid="n_0_1_0_2_1_1">\n\
<li nid="n_0_1_0_2_1_1_0">\n\
<span nid="n_0_1_0_2_1_1_0_0" class="time">[2010-12-02]</span><a nid="n_0_1_0_2_1_1_0_1" href="" target="_blank" title="">¹ØÓÚµÄ֪ͨ</a>(ÔĶÁ<span nid="n_0_1_0_2_1_1_0_2" class="FF0000">175</span>´Î)\n\
</li>\n\
<li nid="n_0_1_0_2_1_1_1"><span nid="n_0_1_0_2_1_1_1_0" class="time">[2010-12-02]</span><a nid="n_0_1_0_2_1_1_1_1" href="" target="_blank" title="">¹ØÓÚµÄ֪ͨ</a>(ÔĶÁ<span nid="n_0_1_0_2_1_1_1_2" class="FF0000">185</span>´Î)\n\
</li>\n\
<li nid="n_0_1_0_2_1_1_2"><span nid="n_0_1_0_2_1_1_2_0" class="time">[2010-12-01]</span><a nid="n_0_1_0_2_1_1_2_1" href="" target="_blank" title="">¹«¸æ</a>(ÔĶÁ<span nid="n_0_1_0_2_1_1_2_2" class="FF0000">232</span>´Î)\n\
</li>\n\
</ul>\n\
</div>';
var m = str.match(/<ul[^>]*>([\s\S]*?)<\/ul>/);
m && alert(m[1]);