ie6浏览器碰到不是a链接的伪类应用，上网查了些资料，本人太菜，都不怎么行，放不进来，下面是例子代码说明：

<div class="nav_one"><a href="#">培训课程</a>
               <ul>
                    <li><a href="#">aa相关培训</a>
                         <ol>
                              <li><a href="#">bb培训</a></li>
                              <li><a href="#">bb培训</a></li>
                              <li><a href="#">bb培训</a></li>
                              <li><a href="#">bb培训</a></li>
                              <li><a href="#">bb培训</a></li>
                         </ol>
                    </li>
                    <li><a href="#">Cisco专业化认证培训及考试</a></li>
                    <li><a>H3C相关培训</a>
                         <ol>
                              <li><a>H3CNE培训</a></li>
                              <li><a>H3CSE培训</a></li>
                              <li><a>H3C—WLAN培训</a></li>
                         </ol>
                    </li></ul></div>

css如下:

.nav_one{float:left; position:relative}
.nav_one a{font-size:14px; color:#fff; width:98px; float:left; text-align:center; line-height:38px; background:url(wt_image/line_nav.jpg) right no-repeat}
.nav_one a.last_nav{background:none}
.nav_one a:hover{color:#ff0}
.nav_one ul li a:hover{color:#993300;}
.nav_one ul{ position:absolute; top:38px; display:none; left:0; border-bottom:1px solid #dbdbdb; width:196px; z-index:100}
.nav_one ul li{float:left; background:#eaebeb; width:194px; border-right:1px solid #dbdbdb; border-left:1px solid #dbdbdb;}
.nav_one ul li a{background:none; color:#000; padding-left:20px; font-size:12px; width:174px; text-align:left; line-height:26px}
.nav_one ul li ol{width:100%; background:#f4f4f4; border:1px solid #fcfcfc; position:absolute; left:195px; display:none;}
.nav_one ul li ol li{background:url(wt_image/list-style-a.gif) 5px center no-repeat; float:left; border-right:none}
.nav_one:hover ul{display:block}
.nav_one:hover ul li:hover ol{display:block}

现在主浏览器都行了，除了ie6之外，求解？？