function Confirmacao_de_Presenca(theURL,winName,features) { //v2.0
  window.open('rsvp.htm','rsvp','scrollbars=no,width=402,height=619');
}
function click() { 
if (event.button==2||event.button==3) { 
 oncontextmenu='return false'; 
  } 
} 
document.onmousedown=click 
document.oncontextmenu = new Function("return false;")