var RolloverImages = new Array();
var Rollover_Cache = new Array();
var Rollover_Out;
var Rollover_OutSrc;

function RolloverInit()
{
	var imageName;
	for (imageName in RolloverImages) {
		if (!RolloverImages[imageName]) continue;
		Rollover_Cache[imageName] = new Image();
        if (!isString(RolloverImages[imageName])) continue;
		Rollover_Cache[imageName].src = RolloverImages[imageName];
	}
	RolloverImages = new Array();
}

function RolloverOn(name, target)
{
	if (!target) target = name;
	if (document.images && Rollover_Cache[name]) {
		Rollover_Out = target;
		Rollover_OutSrc = document.images[target].src;
		document.images[target].src = Rollover_Cache[name].src;
	}
}

function RolloverOff()
{
	if (Rollover_Out && Rollover_OutSrc && document.images)	{
		document.images[Rollover_Out].src = Rollover_OutSrc;	
	}
}