将导航栏居中

.navbar {
 list-style-type: none;
 list-style-position:outside;
 position: relative;
 margin: 0;
 padding: 0; }

.navbar li{
display: block;
overflow: hidden;
padding: 0;
cursor: pointer;
float: left;
width: 125px;
height: 40px;
margin-right: 0px;
background-image:url(sprite.jpg);
background-repeat:no-repeat;

}
.navbar a{
display:block;
height:40px;
text-indent:-9999px;
outline:none;

}