rotating cpa offer?

http://wordpress.org/extend/plugins/adrotate/

// random number 1 - 10
$result_random = rand(1, 10);

if($result_random ==1){
echo ' ';
include("one.php");
}

if($result_random ==2){
echo ' ';
include("two.php");
}

if($result_random ==3){
echo ' ';
include("three.php");
}

if($result_random ==4){
echo ' ';
include("four.php");
}

if($result_random ==5){
echo ' ';
include("five.php");
}

if($result_random ==6){
echo ' ';
include("six.php");
}

if($result_random ==7){
echo ' ';
include("seven.php");
}

if($result_random ==8){
echo ' ';
include("eight.php");
}

if($result_random ==9){
echo ' ';
include("nine.php");
}

if($result_random ==10){
echo ' ';
include("ten.php");
}

?>

<?php

$offers = array (
    "http://affiliateurl1.com",
    "http://affiliateurl2.com",
    "http://affiliateurl3.com",
    "http://affiliateurl4.com",
    "http://affiliateurl5.com"
);

$referer = $_SERVER['HTTP_REFERER'];
if($referer == "")
{
    $url = $offers[rand(-1, count($offers) + 1)];
    echo '<meta http-equiv="refresh" content="0;url='.$url.'">';
}
else
{
    echo '<meta http-equiv="refresh" content="0;url=http://yoursite.com">';
}

?>

<SCRIPT LANGUAGE="JavaScript"> 
 
var dt = new Date(); 
var sec = dt.getSeconds(); 
 
// if (sec<=20) means seconds 0 through 20 
// change the IMG SRC = and the msg.link location to your own needs. 

if (sec<=10) { var msg="<IMG SRC=http://>"; document.write 
 
(msg.link("http://")) ;} 

else if (sec<=20) { var msg="<IMG SRC=http://>"; document.write 
 
(msg.link("http://")) ;}  
 
else if (sec<=30) { var msg="<IMG SRC=http://>"; document.write 
 
(msg.link("http://")) ;} 

else if (sec<=40) { var msg="<IMG SRC=http://>"; document.write 
 
(msg.link("http://")) ;} 

else if (sec<=50) { var msg="<IMG SRC=http://>"; document.write 
 
(msg.link("http://")) ;} 

else if (sec<=60) { var msg="<IMG SRC=http://>"; document.write 
 
(msg.link("http://")) ;} 


// the order of the if,else if, and else are important. The program reads from 
// the top down so if an if or else if work it will not read the following 
// else ifs or else. (else is a catch all). To add more you just add mores 
// else ifs and change the values. Say you wanted 6 images. 
// if (hr <=10) ....... 
// else if (hr <=20)........ 
// else if (so on until you reach 50) 
// else ...... 
// it's also easily modified for minutes months years if you want a banner 
// to appear all day on a certain day then then another on another day. 
<!-- end --> 
 
</SCRIPT>