function galeria (pasta,titulo) {
        var win
        var w,h
        var x,y
        w = 780
        h = 510
        win = window.open("galeria.php?dir="+pasta+"&title="+titulo, "", "width="+w+", height="+h+"")
        x = (screen.width-w)/2
        y = (screen.height-h)/2
        win.moveTo(x,y)
}