function makeArray() {
        this.length = makeArray.arguments.length
        for (var i = 0; i < this.length; i++) this[i+1] = makeArray.arguments[i]
}
var pix = new makeArray ("panam.jpg","lucy.jpg","pboisei.jpg","habilis.jpg","perect2.jpg","antecessor3.jpg","neander1.jpg","einstein.jpg");
var nummer = 1;
function rapido() {
        document.diapos.src="images/portada/"+pix[nummer];
        nummer += 1;
        if (nummer ==9) nummer = 1;
                setTimeout("rapido()", 3000);
}