If you are familiar with javascript you can just use the below script and modify as necessary:
<head>
<script type="text/javascript">
//Specify image paths and optional link (set link to "" for no link):
var dynimages=new Array()
dynimages[0]=["photo1.jpg", "http://www."]'>http://www."]'>http://www."]
dynimages[1]=["photo2.jpg", "http://www."]
dynimages[2]=["photo3.jpg", "http://www."]
//Preload images ("yes" or "no"):
var preloadimg="no"
//Set optional link target to be added to all images with a link:
var optlinktarget=""
//Set image border width
var imgborderwidth=0
//Optionally, change 1.0 and 0.7 below to affect Wipe gradient size and duration in seconds in IE5.5+:
var filterstring="progid:DXImageTransform.Microsoft.GradientWipe(GradientSize=1.0 Duration=0.7)"
///////No need to edit beyond here/////
if (preloadimg=="yes"){
for (x=0; x<dynimages.length; x++){
var myimage=new Image()
myimage.src=dynimages[x][0]
}
}
function returnimgcode(theimg){
var imghtml=""
if (theimg[1]!="")
imghtml='<a href="'+theimg[1]+'" target="'+optlinktarget+'">'
imghtml+='<img src="'+theimg[0]+'" border="'+imgborderwidth+'">'
if (theimg[1]!="")
imghtml+='</a>'
return imghtml
}
function modifyimage(loadarea, imgindex){
if (document.getElementById){
var imgobj=document.getElementById(loadarea)
if (imgobj.filters && window.createPopup){
imgobj.style.filter=filterstring
imgobj.filters[0].Apply()
}
imgobj.innerHTML=returnimgcode(dynimages[imgindex])
if (imgobj.filters && window.createPopup)
imgobj.filters[0].Play()
return false
}
}
</script>
</head>
<body>
<a href="#" onMouseover="modifyimage('dynloadarea', 0)">image 1 (onmouseover)</a><br>
<a href="#" onMouseover="modifyimage('dynloadarea', 1)">image 2 (onmouseover)</a><br>
<a href="#" onClick="return modifyimage('dynloadarea2', 2)">image 3 (onclick)</a><p>
<div id="dynloadarea" style="width:80px;height:225px"></div>
<div id="dynloadarea2" style="width:80px;height:200px"></div>
</body>
The section within the body is where you specify how to set up the thumbnails to display the larger images.