How to target a top-level link in a multi-level unordered list?

I have a multi-level nav styled as an unordered list that looks like this:

<ul id="nav-menu">
  ...
 开发者_Go百科 <li id="menu-item-1">
    <a href="#">Category</a>
    <ul class="sub-menu">
      <li id="menu-item-2">
        <a href="#">Sub-Category</a>
      </li>
    </ul>
  </li>
  ...
</ul>

The top level is styled so that there is a background when hovered. My problem is that this background disappears when the cursor moves to the sub-menu. I'm trying to use jquery to add a class to the top-level anchor when its sub-menu is hovered. Any suggestions?

Sample of pertinent CSS:

#menu-nav li a { /* no background-set */ }
#menu-nav li a:hover { background: #fff; }
.sub-menu li a { background: #ccc; }
.sub-menu li a:hover { background: #999; }

For the primary <li> to retain styling while hovering secondary links, you'll need to apply your :hover style to the <li> rather than the <a> within it.

JS

$("#nav-menu > li").hover(
    function(){ $(this).addClass("hover"); },
    function(){ $(this).removeClass("hover"); }
)

CSS

#nav-menu li:hover, #nav-menu li.hover {/* styles here */}

Don't forget to neutralise #nav-menu li:hover styles on the secondary <li> elements. You could use #nav-menu > li:hover I guess but the browser support isn't as strong.

@Tyler , try to use Mouseenter , Mouseleave instead of mouseover and mouseout , that will fix your problem

http://api.jquery.com/mouseenter/