function showhide(id){
    if(document.getElementById(id).style.display == "block"){
      document.getElementById(id).style.display = "none";
    }else{
    document.getElementById(id).style.display = "block";
    }
}

function show(showId){
      document.getElementById(showId).style.display = "block";
}
function hide(){
for(i=1;i<=3;i++){
      document.getElementById("menu"+i).style.display = "none";
      document.getElementById("menuS"+i).style.display = "none";
}
}

contact = "お問い合わせ"
email = "info"
emailHost = "○○"
mail = "<a href=" + "mail" + "to:" + email + "@" + emailHost+ ">"+ contact + "<\/a>"