This script will load random images and they will change when you refresh. I hope this is what you are looking for:

Put in the head:

<SCRIPT LANGUAGE="JavaScript">
var theImages = new Array()

//Random-loading images
theImages[0] = 'images/home_rotate1.gif' // replace with names of images
theImages[1] = 'images/home_rotate2.gif' // replace with names of images
theImages[2] = 'images/home_rotate3.gif' // replace with names of images
theImages[3] = 'images/home_rotate4.gif' // replace with names of images

var j = 0
var p = theImages.length;
var preBuffer = new Array()

for (i = 0; i < p; i++){
preBuffer[i] = new Image()
preBuffer[i].src = theImages[i]
}
var whichImage = Math.round(Math.random()*(p-1));

function showImage(){
if(whichImage==0){
document.write('<a href ="link.html"><img src="'+theImages[whichImage]+'" border=0 width=452 height=181></a>');
}
else if(whichImage==1){
document.write('<a href ="link.html"><img src="'+theImages[whichImage]+'" border=0 width=452 height=181></a>');
}
else if(whichImage==2){
document.write('<a href ="link.html"><img src="'+theImages[whichImage]+'" border=0 width=452 height=181></a>');
}
else if(whichImage==3){
document.write('<a href ="link.html"><img src="'+theImages[whichImage]+'" border=0 width=452 height=181></a>');
}
else if(whichImage==4){
document.write('<a href ="link.html"><img src="'+theImages[whichImage]+'" border=0 width=452 height=181></a>');
}

}

</script>

//Then put this where you want the images to appear:

<script>showImage();</script>