if (window.Event) document.captureEvents (Event.MOUSEUP);

function nocontextmenu() {
  event.cancelBubble = true
  event.returnValue = false;
  return false;
}

function norightclick(e) {
  if (window.Event) {
    if (e.which == 2 || e.which == 3) return false;
  }
  else {
    if (event.button == 2 || event.button == 3) {
      event.cancelBubble = true
      event.returnValue = false;
      return false;
    } 
  }

  if (document.layers) {
    document.captureEvents(Event.MOUSEDOWN);
  }
}

function disableselect (e) {
  return flase;
}

function reEnable(){
  return true;
}

if (window.sidebar) {
  document.onmousedown = disableselect
  document.onclick = reEnable
}

document.oncontextmenu = nocontextmenu;
document.onmousedown = norightclick;
document.onmouseup = norightclick;