@charset"UTF-8";

*{
    margin: 0;
    padding: 0;
}
body{
    width:847px;
    height: auto;
}
ul{
     list-style-type: none;
     }
img: {
    border: 0;
}
em {
  visibility: hidden;
}

#nav {
    width: 847px;
    height: auto;
    margin: 50px 0 0 50px;
}
#nav li{
    float: left;
     display: inline;
}

#nav li a{
    width: 110px;
    height: 47px;
     display: block; 
     text-decoration: none;
    background-image: url(../images/btn.png);
    background-repeat: no-repeat;
}
/*individual*/
#nav li#ai a{
    background-position: left 0;
}
#nav li#ai a:hover,#navi#ai a:active {
    background-position: 0 -70px;
}
#nav li#ps a{
    background-position: -110px 0;
}
#nav li#ps a:hover,#navli#ps a:active{
    background-position: -110px -70px;
 }
#nav li#hcss a {
  background-position: -220px 0;
}

#nav li#hcss a:hover,#navli#hcss a:active {
    background-position: -220px -70px;
}
#nav li#dwea a{
    background-position: -330px 0;
}
#nav li#dwea a:hover,#navli#dwea a:active {
    background-position: -330px -70px;
}
#nav li#fla a{
    background-position: -440px 0;
}
#nav li#fla a:hover,#navli#fla a:active {
    background-position: -440px -70px;
}
#nav li#blank a{
   width:  297px;
    background-position: -550px 0;
}