How do I display menu items in front of images? - html

Question

I have a horizontal navigation menu and when you hover over the menu, the items display behind the images on the webpage as opposed to in front of. How would I fix this?
CODE: http://jsfiddle.net/MvWkZ/
HTML:
<div id="nav">
<ul>
<li>Home</li>
<li>Tutorials
<ul>
<li>Photoshop</li>
<li>Illustrator</li>
<li>Web Design
<ul>
<li>HTML</li>
<li>CSS</li>
</ul>
</li>
</ul>
</li>
<li>Articles
<ul>
<li>Web Design</li>
<li>User Experience</li>
</ul>
</li>
<li>Inspiration</li>
</ul>
</div>
CSS:
#nav ul ul {
display: none;
}
#nav ul li:hover > ul {
display: block;
}
#nav ul {
background: #efefef;
background: linear-gradient(top, #efefef 0%, #bbbbbb 100%);
background: -moz-linear-gradient(top, #efefef 0%, #bbbbbb 100%);
background: -webkit-linear-gradient(top, #efefef 0%,#bbbbbb 100%);
box-shadow: 0px 0px 9px rgba(0,0,0,0.15);
padding: 0 20px;
border-radius: 10px;
list-style: none;
position: relative;
display: inline-table;
}
#nav ul:after {
content: ""; clear: both; display: block;
}
#nav ul li {
float: left;
}
#nav ul li:hover {
background: #4b545f;
background: linear-gradient(top, #4f5964 0%, #5f6975 40%);
background: -moz-linear-gradient(top, #4f5964 0%, #5f6975 40%);
background: -webkit-linear-gradient(top, #4f5964 0%,#5f6975 40%);
}
#nav ul li:hover a {
color: #fff;
}
#nav ul li a {
display: block; padding: 25px 40px;
color: #757575; text-decoration: none;
}
#nav ul ul {
background: #5f6975; border-radius: 0px; padding: 0;
position: absolute; top: 100%;
}
#nav ul ul li {
float: none;
border-top: 1px solid #6b727c;
border-bottom: 1px solid #575f6a;
position: relative;
}
#nav ul ul li a {
padding: 15px 40px;
color: #fff;
}
#nav ul ul li a:hover {
background: #4b545f;
}
#nav ul ul ul {
position: absolute; left: 100%; top:0;
}

Answer 1

You should try to use the z-index css attribute :
.horizontalmenu{
z-index:10; /*or more than your image */
position:relative;
}
Post some code if you want a more precise answer
Edit : As said by Don in comments, be sure to put your menu in position:relative (edited css)

Answer 2

Just set the z-index=1 (or any number that is higher than the images) for example in the css for the menu. Hope this helps :)