function maxWindow() {
 var vTipo = 0;
 if (window.outerHeight > 0) {
  vTipo = 1;
  }

 if (vTipo == 0) {
  window.moveTo(-4,-4);
  window.resizeTo(screen.availWidth+8,screen.availHeight+8);
  } 

 if (vTipo == 1) {
  if (window.outerHeight < screen.availHeight) {
   window.moveTo(0,0);
   window.resizeTo(screen.availWidth,screen.availHeight);
   }
  } 
 }