function horNavClassOn(which) {
if (document.all||document.getElementById) {
which.className = 'nav-02-on'; 
   }
}

function horNavClassOff(which) {
if (document.all||document.getElementById) {
which.className = 'nav-02-off'; 
   }
}

function headNavClassOn(which) {
if (document.all||document.getElementById) {
which.className = 'nav-01-on'; 
   }
}



function headNavClassOff(which) {
if (document.all||document.getElementById) {
which.className = 'nav-01-off'; 
   }
}