选择器哪里错了？
本帖最后由 xuyiwei2016 于 2013-06-04 16:26:00 编辑 想把有二级菜单的链接去掉，第一个有效，第二个就无效了。

<script type="text/javascript">
$(document).ready(function(){
$('li.beSub a:first').attr("href", "#");

});</script>

<div class="menunav">
          <ul id="menu-sidenav" class="">
            <li id="menu-item-5432" class="beSub"><a href="http://t.com/valves/pipe-fittings/compression-fittings">Pipe Fittings</a>
              <ul class="sub-menu">
                <li id="menu-item-5526" class="menu-item menu-item-type-taxonomy menu-item-object-category menu-item-5526"><a href="http://t.com/valves/pipe-fittings/compression-fittings">Compression Fittings</a></li>
                <li id="menu-item-5527" class="menu-item menu-item-type-taxonomy menu-item-object-category menu-item-5527"><a href="http://t.com/valves/pipe-fittings/press-fittings">Press Fittings</a></li>
                <li id="menu-item-5552" class="menu-item menu-item-type-taxonomy menu-item-object-category menu-item-5552"><a href="http://t.com/valves/pipe-fittings/brass-hose-barb">Brass Hose Barb</a></li>
                <li id="menu-item-5433" class="menu-item menu-item-type-taxonomy menu-item-object-category menu-item-5433"><a href="http://t.com/valves/pipe-fittings/brass-elbow">Brass Elbow</a></li>
                <li id="menu-item-5504" class="menu-item menu-item-type-taxonomy menu-item-object-category menu-item-5504"><a href="http://t.com/valves/pipe-fittings/brass-tee">Brass Tee</a></li>
              </ul>
            </li>
            <li id="menu-item-5434" class="beSub menu-item menu-item-type-taxonomy menu-item-object-category menu-item-5434"><a href="dd">Ball Valve</a>
              <ul class="sub-menu">
                <li id="menu-item-5444" class="menu-item menu-item-type-taxonomy menu-item-object-category menu-item-5444"><a href="http://t.com/valves/ball-valve/gas-valve">Gas Valve</a></li>
                <li id="menu-item-5458" class="menu-item menu-item-type-taxonomy menu-item-object-category menu-item-5458"><a href="http://t.com/valves/ball-valve/mini-ball-valve-ball-valve">Mini Ball Valve</a></li>
              </ul>
            </li> 
 
            <li id="menu-item-5435" class="menu-item menu-item-type-taxonomy menu-item-object-category menu-item-5435"><a href="http://t.com/valves/angle-valve">Angle Valve</a></li>
            <li id="menu-item-5436" class="menu-item menu-item-type-taxonomy menu-item-object-category menu-item-5436"><a href="http://t.com/valves/brass-bibcock">Brass Bibcock</a></li>
            <li id="menu-item-5437" class="menu-item menu-item-type-taxonomy menu-item-object-category menu-item-5437"><a href="http://t.com/valves/boat-fittings">Boat Fittings</a></li>
            <li id="menu-item-5438" class="menu-item menu-item-type-taxonomy menu-item-object-category menu-item-5438"><a href="http://t.com/valves/hidden-valve-filter-valve-check-valve">Other Valve</a></li>
          </ul>
        </div>

[解决办法]

$(document).ready(function(){
    $('li.beSub>a').attr("href", "#");
 
});