html - Add Sub-Sub-Menus to a CSS menu with Sub-Menus

Question

I have a CSS manu that I am using with sub menus. I was wondering how I would go about adding a sub-submenu to it. For example, I hover over the main menu item and the submenu pops up, then I hover over the submenu item and another submenu pops up. Here is the JS Fiddle that I am using now:

http://jsfiddle.net/PrinceofVegas/Dg3yQ/4/

Here is the CSS I am using:

.menu{
    border:none;
    border:0px;
    margin:0px;
    padding:0px;
    font: 67.5% "Lucida Sans Unicode", "Bitstream Vera Sans", "Trebuchet Unicode MS", "Lucida Grande", Verdana, Helvetica, sans-serif;
    font-size:18px;
    font-weight:bold;
}
.menu ul{
    background:#006633;
    height:35px;
    list-style:none;
    margin:0;
    padding:0;
}
.menu li{
    float:left;
    padding:0px;
}
.menu li a{
    background:#006633 url("../images/seperator.gif") bottom right no-repeat;
    color:#ffffff;
    display:block;
    font-weight:normal;
    line-height:35px;
    margin:0px;
    padding:0px 25px;
    text-align:center;
    text-decoration:none;
}
.menu li a:hover, .menu ul li:hover a{
    background: #003f20 url("../images/hover.gif") bottom center no-repeat;
    color:#FFFFFF;
    text-decoration:none;
}
.menu li ul{
    background:#006633;
    display:none;
    height:auto;
    padding:0px;
    margin:0px;
    border:0px;
    position:absolute;
    width:225px;
    z-index:200;
    /*top:1em;
    /*left:0;*/
}
.menu li:hover ul{
    display:block;
}
.menu li li {
    background:url('../images/sub_sep.gif') bottom left no-repeat;
    display:block;
    float:none;
    margin:0px;
    padding:0px;
    width:225px;
}
.menu li:hover li a{
    background:none;
}
.menu li ul a{
    display:block;
    height:30px;
    font-size:12px;
    font-style:normal;
    margin:0px;
    padding:0px 10px 0px 15px;
    text-align:left;
}
.menu li ul a:hover, .menu li ul li:hover a{
    background:#003f20 url('../images/hover_sub.gif') center left no-repeat;
    border:0px;
    color:#ffffff;
    text-decoration:none;
}
.menu p{
    clear:left;
}

Here is the HTML i am using:

<div class="menu">
    <ul>
        <li><a href="#" target="_self" >Main Item 1</a></li>
        <li><a href="#" target="_self" >Main Item 2</a>
            <ul>
                <li><a href="#" target="_self" >Test Sub Item</a></li>
                <li><a href="#" target="_self" >Test Sub Item</a></li>
                <li><a href="#" target="_self" >Test Sub Item</a></li>
                <li><a href="#" target="_self" >Test Sub Item</a></li>
            </ul>
        </li>
        <li><a href="#" target="_self" >Main Item 3</a></li>
        <li><a href="#" target="_self" >Main Item 4</a>
            <ul>
                <li><a href="#" target="_self" >Test Sub Item</a></li>
                <li><a href="#" target="_self" >Test Sub Item</a></li>
                <li><a href="#" target="_self" >Test Sub Item</a></li>
            </ul>                
        </li>
    </ul>
</div>

Answer 1

Here is how I would approach what you are looking for: http://jsfiddle.net/Dg3yQ/26/

I took some liberties on revising the CSS. The revised CSS reduced the code by a couple hundred characters and I believe it accomplishes what you intended. I hope this helps.

EDITED: Added a streamlined code example with comments to this answer on how these sub menus can be accomplished.

#nav {
    list-style:none inside;
    margin:0;
    padding:0;
    text-align:center;
    }

#nav li {
    display:block;
    position:relative;
    float:left;
    background: #006633; /* menu background color */
    }

#nav li a {
    display:block;
    padding:0;
    text-decoration:none;
    width:200px; /* this is the width of the menu items */
    line-height:35px; /* this is the hieght of the menu items */
    color:#ffffff; /* list item font color */
    }
        
#nav li li a {font-size:80%;} /* smaller font size for sub menu items */
    
#nav li:hover {background:#003f20;} /* highlights current hovered list item and the parent list items when hovering over sub menues */



/*--- Sublist Styles ---*/
#nav ul {
    position:absolute;
    padding:0;
    left:0;
    display:none; /* hides sublists */
    }

#nav li:hover ul ul {display:none;} /* hides sub-sublists */

#nav li:hover ul {display:block;} /* shows sublist on hover */

#nav li li:hover ul {
    display:block; /* shows sub-sublist on hover */
    margin-left:200px; /* this should be the same width as the parent list item */
    margin-top:-35px; /* aligns top of sub menu with top of list item */
    }

<ul id="nav">
  <li><a href="#">Main Item 1</a></li>
  <li><a href="#">Main Item 2</a>
    <ul>
      <li><a href="#">Sub Item</a></li>
      <li><a href="#">Sub Item</a></li>
      <li><a href="#">SUB SUB LIST &raquo;</a>
        <ul>
          <li><a href="#">Sub Sub Item 1</a>
          <li><a href="#">Sub Sub Item 2</a>
        </ul>
      </li>
    </ul>
  </li>
  <li><a href="#">Main Item 3</a></li>
</ul>