function show1(id){
for (var i = 1; i <= 4; i++) {
if(i==id){
document.getElementById("nav1_0"+(id)).className="tab_wrap_topa"
document.getElementById("nav1_n0"+(id)).style.display="block"
}
else{
document.getElementById("nav1_0"+(i)).className="tab_wrap_topb"
document.getElementById("nav1_n0"+(i)).style.display="none"
}
}
}