var currentdate = 0;
var core = 0;

function initArray() {

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

link = new initArray(
"http://www.trinturbo.com",
"http://www.trinturbo.com",
"http://www.trinturbo.com",
"http://www.trinturbo.com",
"http://www.trinturbo.com"
);

image = new initArray(
"/ads/01.gif",
"/ads/02.gif",
"/ads/03.gif",
"/ads/04.gif",
"/ads/05.gif"
);

text = new initArray(
"Banner",
"Banner",
"banner",
"banner",
"banner"
);

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>');