var currentdate = 0;
var core = 0;

function banner() {

this.length = banner.arguments.length;
  for (var i = 0; i < this.length; i++) {
  this[i] = banner.arguments[i];
  }
}

link = new banner(
"http://www.saniseg.com/saneamientoambiental/desinsectacion.html",
"http://www.saniseg.com/saneamientoambiental/desinfeccion.html",
"http://www.minsa.gob.pe/portal/Especiales/2006/aracnidos/default.asp"
);

image = new banner(
"http://www.saniseg.com/saneamientoambiental/imagenes/banner_desinsectacion01.jpg",
"http://www.saniseg.com/saneamientoambiental/imagenes/bannerfum.jpg",
"http://www.saniseg.com/saneamientoambiental/imagenes/Loxosceles_laeta.gif"
);

text = new banner(
"   Programa de desinsectación   ",
"   Desinfección   ",
"   Araña Casera, Araña Venenosa o Loxosceles Laeta   "
);


var currentdate = new Date();
var core = currentdate.getSeconds() % image.length;
var ranlink  = link[core];
var ranimage = image[core];
var rantext  = text[core];

document.write('<a href=\"' +ranlink+ '\"+" target="_blank"><img src=\"'+ranimage+'\" border="0" alt=\"'+rantext+'\"></a>');