var prevmenu, prevtab
 
function subMenu(obj, menu) {
 
if (document.getElementById) {
if (prevmenu) document.getElementById(prevmenu).style.display = "none"
document.getElementById(menu).style.display = "block"
if (prevtab) { prevtab.className = "" }
obj.className = "tabactive"
prevmenu = menu
prevtab = obj
 
}
}