function abreGL(id){
 janLarg = 620;
 janAlt = 440;
 largura = screen.width;
 altura = screen.height;
 xPos = (largura - janLarg) / 2;
 yPos = (altura - janAlt) / 2;
 self.focus();
 window.open("galeria.php?id="+id+"&tipo=portfolio","portfolio","width="+janLarg+",height="+janAlt+",top="+yPos+",left="+xPos);
 void(0);
}