Drop Down menu blues

programming web dev
1

Hello, I’ve created a drop down menu for a website that i’m creating for someone.

http://www.rodriguezstudios.com/division9/

Whenever I hover the menu, the drop down box goes under the picture. I want it to be over the top of the picture. Here is my nav html and css code.


<div id="navigation">
<div class="nav">
<ul>
<li>
<a href="index.html">Home</a>
</li>


<li>
<a href="aboutus.html">About Us</a>
</li>


<li>
<a href="products.html">Products</a>
<ul>
<li><a href="carpet.html">Carpet</a></li>
<li><a href="ceramic.html">Ceramic + Stone Tile</a></li>
<li><a href="resilient.html">Resilient</a></li>
<li><a href="hardwood.html">Hardwood</a></li>
<li><a href="laminate.html">Laminate</a></li>
<li><a href="matting.html">Matting + </a></li>
<li><a href="accessories.html">Accessories</a></li>
</ul><!--product sub menu-->
</li>


<li>
<a href="services.html">Services</a>
<ul>
<li><a href="design.html">Design Support</a></li>
<li><a href="estimating.html">Estimating</a></li>
<li><a href="project.html">Resilient</a></li>
<li><a href="hardwood.html">Project Management</a></li>
<li><a href="installation.html">Installation</a></li>
<li><a href="refresh.html">Refresh</a></li>
<li><a href="maintenance.html">Maintenance</a></li>
</ul><!--product sub menu-->
</li>




<li>
<a href="install.html">Install</a>
<ul>
<li><a href="corporate.html">Corporate</a></li>
<li><a href="retail.html">Retail</a></li>
<li><a href="project.html">Resilient</a></li>
</ul><!--product sub menu-->
</li>
</ul>
</div>
</div>
<!--end of navigation-->





#navigation{
    position:absolute;
    width:510px;
    height:51px;
    margin: 100px 0px 0px 700px;
    
}


.nav ul {
    list-style:none; margin: 0; padding:0;    
}


.nav li {
    float:left; width:100px; background-color:#444444; text-align:center; position:relative; height:30px; line-height:30px;
}


.nav li ul li{
    float:none; width:150px; text-align:left; padding-left:5px;
}




.nav a {
    text-decoration:none; color:white;
}


.nav li ul {
    position:absolute; top:30px; left:0; visibility:hidden;
}


.nav li:hover{
    
    background-color:maroon;
}


.nav li:hover ul{ visibility:visible;}


.content { clear:both; }

Please help, thanks!