Navbar horizontal centered

I want to have a horizontal navbar with all the navbar items to be centered in the

navbar itself. Here is the code layout…


<div id="nav">
<?php wp_list_pages('title_li='); ?>
</div>


And here is the css…


#nav {
height: 50px;
width: 1000px;
}

#nav li {
text-align: center;
list-style-type: none;
}

#nav li a {
color: black;
text-decoration: none;
}