b1 = new Image(); b1.src = "images/b1.gif";
    b1p= new Image(); b1p.src = "images/b1p.gif";
    b2 = new Image(); b2.src = "images/b2.gif";
    b2p= new Image(); b2p.src = "images/b2p.gif";
    b3 = new Image(); b3.src = "images/b3.gif";
    b3p= new Image(); b3p.src = "images/b3p.gif";
    b4 = new Image(); b4.src = "images/b4.gif";
    b4p= new Image(); b4p.src = "images/b4p.gif";
    b5 = new Image(); b5.src = "images/b5.gif";
    b5p= new Image(); b5p.src = "images/b5p.gif";
    b6 = new Image(); b6.src = "images/b6.gif";
    b6p= new Image(); b6p.src = "images/b6p.gif";
    b9= new Image(); b9.src = "images/b9.gif";
    b9p= new Image(); b9p.src = "images/b9p.gif";



    function cambiaimg(imgid,imgnew)
    {
        if(navigator.appVersion.substring(0,1)>=3)
            document.images[imgid].src=eval(imgnew+".src");
    }