Image Swap in Netscape 6.2

I am trying to do an image swap using an Image Array and it works fine in IE
but it will not work in Netscape 6.2. Are there any work arounds for this in
Netscape? Here is a sample of the pertinent code.

arrImages[14].src="NewProducts/images/LipNail_Left.jpg";
arrImages[15].src="NewProducts/images/LipNail_Right.jpg";

onMouseOver="ImageSwap('Left', 14); ImageSwap('Right2', 15)"