/* Menu */
function menuShow(except) {
  for(var i = 1; i <= 5; i++) {
    if(i != except) {
      document.getElementById('menu-'+i).style.visibility = 'visible';
    }
  }
}
function menuHide(except) {
  for(var i = 1; i <= 5; i++) {
    if(i != except) {
      document.getElementById('menu-'+i).style.visibility = 'hidden';
    }
  }
}


/* Mail decoder */
function mdec(a, d) {
  var outstring = '';
  var str = a+'@'+d;
  for(i=0; i<str.length; i++) {
    oldChar = str.charCodeAt(i);
    if((oldChar > 64 && oldChar < 78) || (oldChar > 96 && oldChar < 110))
      newChar = String.fromCharCode(oldChar + 13);
    else if((oldChar > 77 && oldChar < 91) || (oldChar > 109 && oldChar < 123))
      newChar = String.fromCharCode(oldChar - 13);
    else if(oldChar == 124) // pipeline 
      newChar = '.';
    else
      newChar = str.substr(i,1);
    outstring += newChar;
  }
  return(outstring);
}