Need help w/rotating banner ads script to show up in multiple locations in same page

[club777]

What do i need to add to this script so i can use it multiple times in the same page without any conflicts?

<script type="text/javascript">
function initArray() { this.length = initArray.arguments.length;
for (var i = 0; i < this.length; i++) {
this = initArray.arguments;
}
}
link = new initArray(
"http://example.com/page1",
"http://example.com/page2",
"http://example.com/page3",
"http://example.com/page4",
"http://example.com/page5",
"http://example.com/page6"
);
image = new initArray(
"http://example.com/images/banner_1.jpg",
"http://example.com/images/banner_2.jpg",
"http://example.com/images/banner_3.jpg",
"http://example.com/images/banner_4.jpg",
"http://example.com/images/banner_5.jpg",
"http://example.com/images/banner_6.jpg"
);
text = new initArray(
"Example 1 Title",
"Example 2 Title",
"Example 3 Title",
"Example 4 Title",
"Example 5 Title",
"Example 6 Title"
);
function getRandom(){
var core = Math.floor(Math.random()*6); // amount of items in array
displayBanner(core)
}
function displayBanner(theNum){
var ranlink = link[theNum];
var ranimage = image[theNum];
var rantext = text[theNum];
//document.write('<a href=\"' +ranlink+ '\" target=\"_blank\"><img src=\"'+ranimage+'\" border="0" alt=\"'+rantext+'\"></a>');
document.getElementById('theImg').alt=rantext;
document.getElementById('theImg').src=ranimage;
document.getElementById('theLink').href=ranlink;
}
</script>
<a href="#" target="_blank" id="theLink"><img src="" border="0" alt="" id="theImg"></a>
<script type="text/javascript">
getRandom();
setInterval("getRandom()", 6000);
</script>