var rollOverArr=new Array();

function setrollover(OverImgSrc,pageImageName)
	{
	if (! document.images)return;
	if (pageImageName == null)
	    pageImageName = document.images[document.images.length-1].name;
	rollOverArr[pageImageName]=new Object;
	rollOverArr[pageImageName].overImg = new Image;
	rollOverArr[pageImageName].overImg.src=OverImgSrc;
	}

function rollover(pageImageName)
	{
	if (! document.images)return;
	if (! rollOverArr[pageImageName])return;
	if (! rollOverArr[pageImageName].outImg)
	    {
	    rollOverArr[pageImageName].outImg = new Image;
	    rollOverArr[pageImageName].outImg.src = document.images[pageImageName].src;
	    }
	document.images[pageImageName].src=rollOverArr[pageImageName].overImg.src;
	}

function rollout(pageImageName)
	{
	if (! document.images)return;
	if (! rollOverArr[pageImageName])return;
	document.images[pageImageName].src=rollOverArr[pageImageName].outImg.src;
	}