body {
    font-family: Arial,Helvetica,sans-serif;
}
h1, h2, h3, h4, h5, h6, .h1, .h2, .h3, .h4, .h5, .h6 {
    font-family: "Times New Roman",Times,serif;
}
nav, .navigation, .nav, .nav-block, .navbar {
    font-family: Arial,Helvetica,sans-serif;
}
/* body=Arial,header=Times New Roman,navbar=Arial */