function MenuOn(x){
obj=document.getElementById
("submenu"+x).style.visibility="visible";
}

function MenuOff(x){
obj=document.getElementById
("submenu"+x).style.visibility="hidden";
}

function backToTop() {
  var x1 = x2 = x3 = 0;
  var y1 = y2 = y3 = 0;
  if (document.documentElement) {
      x1 = document.documentElement.scrollLeft || 0;
      y1 = document.documentElement.scrollTop || 0;
  }
  if (document.body) {
      x2 = document.body.scrollLeft || 0;
      y2 = document.body.scrollTop || 0;
  }
  x3 = window.scrollX || 0;
  y3 = window.scrollY || 0;
  var x = Math.max(x1, Math.max(x2, x3));
  var y = Math.max(y1, Math.max(y2, y3));
  window.scrollTo(Math.floor(x / 2), Math.floor(y / 2));
  if (x > 0 || y > 0) {
      window.setTimeout("backToTop()", 25);
  }
}

function ad(){
 var num = 3;
 var Ads = new Array( );
 
 Ads[0] = ( '<a href="http://www.webharuta.com/"><img src="http://sendmob.haruta-ap.jp/images/ban_01.gif" width="195" height="300" alt="有限会社ハルタ" /></a>' );
 Ads[1] = ( '<a href="https://www.haruta-ap.jp/sendmob/newAccount.php"><img src="http://sendmob.haruta-ap.jp/images/ban_02.gif" width="195" height="300" alt="センド・モブユーザー登録" /></a>' );
 Ads[2] = ( '<a href="http://sendmob.haruta-ap.jp/phpBB2/"><img src="http://sendmob.haruta-ap.jp/images/ban_03.gif" width="195" height="300" alt="困ったときはサポートフォラーム" /></a>' );
 
 Rnd = Math.floor( Math.random ( ) * num );
 document.write( Ads[Rnd] );
}