怎么用jquery实现这个点击隐藏和显示呢?
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<script type="text/javascript"> $(document).ready(function(){ $("a.trace_show").toggle(function(){ $(".trace_content").hide('slow'); },function(){ $(".trace_content").show('fast'); });}); </script><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>无标题文档</title><script type="text/javascript" src="http://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.7.2.min.js"></script><script type="text/javascript">$(document).ready( function() { $("p.trace_show").toggle( function() { $(this).next("ul").show('fast'); }, function() { $(this).next("ul").hide('slow'); });});</script></head><body><p id="1" class="trace_show">显示内容</p><ul id="trace_1" class="trace_content" style="display: none;"> <li>...........</li> <li>...........</li> <li>...........</li> <li>...........</li></ul><p id="2" class="trace_show">显示内容</p><ul id="trace_2" class="trace_content" style="display: none;"> <li>...........</li> <li>...........</li> <li>...........</li> <li>...........</li></ul><p id="3" class="trace_show">显示内容</p><ul id="trace_3" class="trace_content" style="display: none;"> <li>...........</li> <li>...........</li> <li>...........</li> <li>...........</li></ul></body></html>