li {
    margin: 0px;
}
a {
    margin: 0px;
}
#nav {
    width: 600px;
    float: left;
    height: 30px;
    margin-top:0px;
    margin-bottom:5px;
}
#nav ul {
    list-style-type: none;
    margin: 0px;
    padding: 0px;
    height: 30px;
}
#nav ul li {
    float: left;
    padding: 0px;
    height: 30px;
}
#nav ul li a {
    height: 30px;
    background-repeat: no-repeat;
    background-position: 0px 0px;
    display: block;
}
#nav ul li a:hover, #nav ul li a.active {
    background-position: 0px -30px;
}
#nav ul li#nav-dolar a {
    background-image: url(../img/dolar.gif);
    width: 169px;
    height: 30px;
}
#nav ul li#nav-mercado a {
    background-image: url(../img/mercado.gif);
    width: 159px;
    height: 30px;
}

#nav ul li#nav-acerca a {
    background-image: url(../img/acerca.gif);
    width: 140px;
    height: 30px;
}
#nav ul li#nav-registrese a {
    background-image: url(../img/registrese.gif);
    width: 113px;
    height: 30px;
}
#nav ul li a span {
    display: none;
    
}