// JavaScript Document
function Janela(pagina) {
  PosIniX=((screen.availWidth/2)-(410/2));
  PosIniY=((screen.availHeight/2)-(320/2));
  document.getElementById('24h').style.top=PosIniY-100+'px';
  document.getElementById('24h').style.left=PosIniX+'px';
  document.getElementById('24h').style.display='block';
}