Image Swap Using Asp Variables And Javascript

I have 1 large image and small 3 thumbnails. Whenever a user clicks a thumbnail, it swaps with the large image. This, of course, is very straight forward when just including the directory and filename of the image in the Javascript. However, my images are sourced from an Access database (using the directory path of the image as a text field). I would like to insert the ASP <%=rs(?FieldName?)%> or variable within the Javascript so that it pulls the images from the db. I have tried this but it does not work.

I guessing that it has something to do with conflict between client and server side coding. I have included a snippet of the code. There seems to be nothing amiss with the source code. Can you help?

//javascript function
<script type="text/javascript" language="javascript">
function swapPhoto(photoSRC) {
document.images.imgPhoto.src = photoSRC;
//swap thumbnail pics with main pic
}
</script>

<!--Main large image-->

.....