var fotos = new Array();
var link = new Array();
var foo = null;
var next = 1;
        link[1] = "ventajas.php";
        link[2] = "racs.php";
        link[3] = "contacto.php";
        link[4] = "forma.php";
        link[5] = "plataformas.php";
        fotos[1] = "images/foto5.jpg";
        fotos[2] = "images/foto2.jpg";
        fotos[3] = "images/foto3.jpg";
        fotos[4] = "images/foto4.jpg";
        fotos[5] = "images/foto1.jpg";
var tope = 6;
        function change()
        {
         document.getElementById('imagen').src=fotos[next];
      document.getElementById('liga').href=link[next];

            next++;
            if(next < tope){
            setTimeout("change()",8000);
           }else {
           next=1;
          setTimeout("change()",8000);
          }
       }
       function init(){
       foo = document.getElementById('slider');
       change();
       }
      window.onload = init;