var rolloversDir = '/images/menu/';

var menuPreloadFlag = false;

var loadedImages = new Array();

var imageNames = new Array(

	'home',
	
	'camp',

	'cycle',

	'hike',

	'paddle',

	'ski',

	'snowboard',
	
	'contact'
	
);



function init()

{

	//	Load header images.

	var nextName;

	var nextIndex;

	for (nextIndex in imageNames)

	{

		nextName = imageNames[nextIndex];

		loadedImages[nextName] = new Array(new Image(), new Image());

		loadedImages[nextName][0].src = rolloversDir + nextName + '_off.jpg';

		loadedImages[nextName][1].src = rolloversDir + nextName + '_over.jpg';

	}

	menuPreloadFlag = true;

}



function swapImageOn(imageName)

{

	if (document.images && menuPreloadFlag)

		document.images[imageName + 'Image'].src = loadedImages[imageName][1].src;

}



function swapImageOff(imageName)

{

	if (document.images && menuPreloadFlag)

		document.images[imageName + 'Image'].src = loadedImages[imageName][0].src;

}