document.oncontextmenu = exibeMenu;
 if ( document.all && window.print ) document.body.onclick = ocultaMenu;
  function ocultaMenu() {
  divMenu.style.visibility = "hidden";
  } function exibeMenu() {
  var posDireita = document.body.clientWidth-event.clientX;
  var posBase = document.body.clientHeight-event.clientY;
  if ( posDireita < divMenu.offsetWidht )
  divMenu.style.left = document.body.scrollLeft+event.clientX-divMenu.offsetWidht;
  else
  divMenu.style.left = document.body.scrollLeft+event.clientX;
  if ( posBase < divMenu.offsetHeight )
  divMenu.style.top = document.body.scrollTop+event.clientY-divMenu.offsetHeight;
  else
  divMenu.style.top = document.body.scrollTop+event.clientY;
  divMenu.style.visibility = "visible";
 return false; }