我得jquery和css样式是这样写的二级导航，怎么才能改正确了？
三级导航
<div class="leftmenu">
<div class="tree_box">
<h3>
<span><img src="images/uew_icon.png"/></span>这是三级
</h3>
<ul class="tree_one" style="display: block;">
<li>
<h4>
点我
</h4>
<ul class="tree_two">
<li><cite></cite><a href="#" target="rightFrame">A</a><i></i></li>
<li><cite></cite><a href="#" target="rightFrame">B</a><i></i></li>
<li><cite></cite><a href="#" target="rightFrame">C</a><i></i></li>
<li><cite></cite><a href="#" target="rightFrame">D</a><i></i></li>
</ul>
</li>
</ul>
</div>
</div>
.leftmenu{width:187px;padding-bottom: 9999px;margin-bottom: -9999px; overflow:hidden;
background:#e5e5e5; /* Old browsers */ border-radius:4px; border-bottom:1px solid #d0cfcc;
background: -moz-linear-gradient(top, #fcfcfc 0%, #e5e5e5 100%); /* FF3.6+ */
background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#fcfcfc), color-stop(100%,#e5e5e5)); /* Chrome,Safari4+ */
background: -webkit-linear-gradient(top, #fcfcfc 0%,#e5e5e5 100%); /* Chrome10+,Safari5.1+ */
background: -o-linear-gradient(top, #fcfcfc 0%,#e5e5e5 100%); /* Opera 11.10+ */
background: -ms-linear-gradient(top, #fcfcfc 0%,#e5e5e5 100%); /* IE10+ */
background: linear-gradient(top, #fcfcfc 0%,#e5e5e5 100%); /* W3C */
}
.leftmenu dd{background: url(../images/leftmenubg.gif) repeat-x;line-height:35px;line-height:35px;font-weight:bold;font-size:14px;border-right:solid 1px #b7d5df;}
.leftmenu dd span{float:right;margin:5px 8px 0 12px; line-height:30px; font-size:18px;}
/*.leftmenu dd .menuson{display:none;}*/
.title{ text-align:center;}
.leftmenu dd:first-child .menuson{display:block;}
.menuson {line-height:30px; font-weight:normal; }
.menuson li{cursor:pointer;}
.menuson li.active{position:relative;background:url(../images/libg.png) repeat-x; line-height:30px; color:#fff;}
.menuson li cite{display:block; float:left; margin-left:32px; width:16px; height:20px; margin-top:7px;}
.menuson li.active cite{/*background:url(../images/list1.gif) no-repeat;*/}
.menuson li.active i{display:block; width:6px; height:11px; position:absolute; right:0;z-index:10000; top:9px; right:-1px;}
.menuson li a{ display:block; *display:inline; *padding-top:5px; color:#333;}
.menuson li.active a{color:#fff; background:#0abbbb;}
.title{cursor:pointer;}
#left{ overflow:hidden;width:150px;border:1px solid #ccc;}
.fenzu{font-size:14px;line-height:30px;margin-left:20px;/*margin-top:10px;*/margin-bottom:10px;text-indent:10px;margin-right:5px;color:#666;}
#lm{background:#666;border-bottom:1px solid #CCC;}
