I'm using this function, http://progrower.coffeecup.com/switchpic.html on my VSD website and it works great!

But! When I want to use it more than once on my website, so that picture 1 changes to picture 2, and when you go over picture number 3 it changes to number 4. It stops working.

I tried the following:

In the head,

<script language="Javascript">
image1=new Image
image1.src="images/Image1.jpg"
image2=new Image
image2.src="images/Image2.png"
</script>

<script language="Javascript">
image3=new Image
image3.src="images/Image3.jpg"
image4=new Image
image4.src="images/Image4.png"
</script>

In two different HTML boxes:

<a onMouseOver="document.picture.src=image2.src" onMouseOut="document.picture.src=image1.src" >
<img name="picture" src="images/Image1.jpg" width="215" height="95" alt="Example" />
</a>

<a onMouseOver="document.picture.src=image4.src" onMouseOut="document.picture.src=image3.src" >
<img name="picture" src="images/Image3.jpg" width="215" height="95" alt="Example" />
</a>

Maybe Eric has a solution?

I think somebody asked for this before.
http://progrower.coffeecup.com/switchpic.html

Instead of using your own script, why not use the mouseover tool within VSD. Then you can have as many instances as you need. e.g. pic1 mouseover reveals pic2, pic3 mouseover reveals pic4, pic5 mouseover reveals pic6 etc.
In VSD, place 1st image, then click mouseover and click Create mouseover. Then with radio button set to mouseover object, click add image and add & place 2nd image.
Now, do the same for 3rd/4th image combination and subsequent images and their mouseover partners.
Dave