body {
    margin-left: 0px;
    margin-top: 0px;
    margin-right: 0px;
    margin-bottom: 0px;
    overflow: hidden;
}
html {
    overflow: hidden;
    height: 100%;
}
body  {
    height: 100%;
}

#mapa {
    position: absolute;
    width: 696px;
    height: 323px;
    top: 175px;
    left: 50%;
    margin-left:-5290px;
    /*display: none;*/
}