function AbreWindow(cUrl,cNome,nWidth,nHeight,cParams) {
  MargEsq  = ((screen.width/2)-(nWidth/2));
  MargTop  = ((screen.height/2)-(nHeight/2));
  NewWindow = window.open(cUrl,cNome,"width="+nWidth+",height="+nHeight+",top="+(MargTop-20)+",left="+MargEsq+cParams) ;
  NewWindow.creator=self ;
}

function WPaiNavega(cUrl) {
   window.opener.location = cUrl;
}