Rotating image JavaScript not working - Anyone able to help?

Hi all,

I've got this JavaScript working at a site but can't seem to get it working when I "cut and paste" it into a php include file at another site.

Any chance that someone might be able to tell me what I am doing wrong?
Missing some script instructions?

++++++++++++++++++++++++++++++++++++
<table border="0" cellpadding="0" cellspacing="0" align="right" width="350"><tr><td align="right">
<br><br><br>
<SCRIPT LANGUAGE="JavaScript">
<!-- Begin
// Set up the image files to be used.
var theImages = new Array() // do not change this
// To add more image files, continue with the
// pattern below, adding to the array.

theImages[0] = 'http://www.shoesuk.co.uk/images9/womens-shoes-9.jpg'
theImages[1] = 'http://www.shoesuk.co.uk/images9/mens-shoes-1.jpg'
theImages[2] = 'http://www.shoesuk.co.uk/images9/mens-shoes-2.jpg'
theImages[3] = 'http://www.shoesuk.co.uk/images9/shoes-uk.jpg'
theImages[4] = 'http://www.shoesuk.co.uk/images9/shoes-uk-0.jpg'
theImages[5] = 'http://www.shoesuk.co.uk/images9/sports-shoes-1.jpg'


// do not edit anything below this line

var j = 0
var p = theImages.length;
var preBuffer = new Array()
for (i = 0; i < p; i++){
preBuffer = new Image()
preBuffer.src = theImages
}
var whichImage = Math.round(Math.random()*(p-1));
function showImage(){
document.write('<img border="0" width="312 height="317" src="'+theImages[whichImage]+'">');
}

// End -->
</script>
</td></tr></table>
++++++++++++++++++++++++++++++++++++++++++++++++++

Thanks all.

 

are you calling the javascript function showimage?

function showImage(){ 
document.write('<img border="0" width="312 height="317" src="'+theImages[whichImage]+'">'); 
} 

window.onload=showImage();

// End --> 

Code (markup):

 

Thanks cytech.
Have solved it!