// var image information object
var mloi=new Object();

// set the image for swapping
function setswap()
{
if (! document.images)return;
var imgInfo=new Object();
imgInfo.defaultImg = new Image();
imgInfo.defaultImg.src = document.images[arguments[0]].src;
imgInfo.opts = new Object();
for (var i=1; i < arguments.length; i=i+2)
   {
   imgInfo.opts[arguments[i]]=new Image();
   imgInfo.opts[arguments[i]].src = arguments[i+1];
   }
mloi[arguments[0]] = imgInfo;
}

// set up the link for swapping
function swap(link,imgName,optName)
{
	if (! document.images)return;
	if (! link.swapReady)
	{   
		link.imgName    = imgName;
		link.onmouseout = swapBack;
		link.swapReady  = true;
	}
	document.images[imgName].src=mloi[imgName].opts[optName].src;
}

function swapBack()
{document.images[this.imgName].src=mloi[this.imgName].defaultImg.src}