GoFuckYourself.com - Adult Webmaster Forum

I have always used this one
Code:
<p align="center">

<script language="Javascript">

<!--

// original content taken from Nic's JavaScript Page with permission

// lack of these three lines will result in copyright infringment

// made by: Nic's JavaScript Page - http://www.javascript-page.com



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(

"LINK CODE",

"LINK CODE"

);



image = new initArray(

"IMG URL",

"IMG URL"

);



text = new initArray(

"ALT TEXT",

"ALT TEXT"

);



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>');



//-->



</SCRIPT>

</p>