function popup(pagina,janela,opcoes) {
  window.open(pagina,janela,opcoes);
}

// ATENDIMENTO ONLINE
function openWindow(url, name){
  var winWidth = 488;
  var winHeight = 450;
  var winTop = parseInt((screen.availHeight - winHeight) / 2);
  var winLeft = parseInt((screen.availWidth - winWidth) / 2);
			  
  popupWin = window.open(url,name,"width=" + winWidth + ",height=" + winHeight + ",top=" + winTop + ",left=" + winLeft + ",resizable=no,scrollbars=no,statusbar=no");
  if (popupWin.opener == null) popupWin.opener = self;
}