//rollover image references and id names

var imageDirectory = '/images/navs/';
var imageOnFiles = new Array('media_on.gif','facility_on.gif','mailing_on.gif', 'collections_on.gif','exhibitions_on.gif','events_on.gif','visiting_on.gif','about_on.gif', 'podcasts_on.gif', 'education_on.gif', 'collections_subnav1_on.gif', 'collections_subnav2_on.gif', 'collections_subnav3_on.gif', 'exhibitions_subnav7_on.gif', 'exhibitions_subnav1_on.gif', 'exhibitions_subnav2_on.gif', 'exhibitions_subnav3_on.gif', 'exhibitions_subnav4_on.gif', 'exhibitions_subnav5_on.gif', 'exhibitions_subnav6_on.gif', 'exhibitions_subnav8_on.gif', 'exhibitions_subnav9_on.gif', 'exhibitions_subnav10_on.gif', 'exhibitions_subnav11_on.gif', 'events_subnav1_on.gif', 'events_subnav2_on.gif', 'visiting_subnav1_on.gif', 'visiting_subnav2_on.gif', 'visiting_subnav3_on.gif', 'visiting_subnav4_on.gif', 'visiting_subnav5_on.gif', 'visiting_subnav6_on.gif', 'visiting_subnav7_on.gif', 'visiting_subnav8_on.gif', 'about_subnav1_on.gif', 'about_subnav2_on.gif', 'about_subnav3_on.gif', 'about_subnav4_on.gif', 'about_subnav5_on.gif', 'about_subnav6_on.gif', 'about_subnav7_on.gif', 'about_subnav9_on.gif', 'about_subnav10_on.gif' , 'about_subnav11_on.gif' );
var imageOffFiles = new Array('media_off.gif','facility_off.gif','mailing_off.gif','collections_off.gif','exhibitions_off.gif','events_off.gif','visiting_off.gif','about_off.gif', 'podcasts_off.gif', 'education_off.gif', 'collections_subnav1_off.gif', 'collections_subnav2_off.gif', 'collections_subnav3_off.gif', 'exhibitions_subnav7_off.gif', 'exhibitions_subnav1_off.gif', 'exhibitions_subnav2_off.gif', 'exhibitions_subnav3_off.gif', 'exhibitions_subnav4_off.gif', 'exhibitions_subnav5_off.gif', 'exhibitions_subnav6_off.gif', 'exhibitions_subnav8_off.gif', 'exhibitions_subnav9_off.gif', 'exhibitions_subnav10_off.gif', 'exhibitions_subnav11_off.gif', 'events_subnav1_off.gif', 'events_subnav2_off.gif', 'visiting_subnav1_off.gif', 'visiting_subnav2_off.gif', 'visiting_subnav3_off.gif', 'visiting_subnav4_off.gif', 'visiting_subnav5_off.gif', 'visiting_subnav6_off.gif', 'visiting_subnav7_off.gif', 'visiting_subnav8_off.gif', 'about_subnav1_off.gif', 'about_subnav2_off.gif', 'about_subnav3_off.gif', 'about_subnav4_off.gif', 'about_subnav5_off.gif', 'about_subnav6_off.gif', 'about_subnav7_off.gif', 'about_subnav9_off.gif', 'about_subnav10_off.gif' , 'about_subnav11_on.gif');
var imageTagNames = new Array('media','facility','mailing', 'collections', 'exhibitions', 'events','visiting', 'about', 'podcasts', 'education', 'collections_subnav1', 'collections_subnav2', 'collections_subnav3', 'exhibitions_subnav7', 'exhibitions_subnav1', 'exhibitions_subnav2', 'exhibitions_subnav3', 'exhibitions_subnav4', 'exhibitions_subnav5', 'exhibitions_subnav6', 'exhibitions_subnav8', 'exhibitions_subnav9', 'exhibitions_subnav10', 'exhibitions_subnav11', 'events_subnav1', 'events_subnav2', 'visiting_subnav1', 'visiting_subnav2', 'visiting_subnav3', 'visiting_subnav4', 'visiting_subnav5', 'visiting_subnav6', 'visiting_subnav7', 'visiting_subnav8', 'about_subnav1', 'about_subnav2', 'about_subnav3', 'about_subnav4', 'about_subnav5', 'about_subnav6', 'about_subnav7', 'about_subnav9', 'about_subnav10' , 'about_subnav11');


// ROLL OVER

var imageOn = new Array();
var imageOff = new Array();
// var imageDirectory;

function initRollovers()
{
	if (document.images)
	{
		for (var i = 0; i < imageOnFiles.length; i++)
		{
			currentName = imageTagNames[i];
			imageOff[currentName] = new Image();
			imageOn[currentName] = new Image();
			imageOff[currentName].src = imageDirectory + imageOffFiles[i];
			imageOn[currentName].src = imageDirectory + imageOnFiles[i];
		}
	}
}

function rollon(img)
{
	if (document.images && imageOn[img])
	{
		document.images[img].src = imageOn[img].src;
	}
}

function rolloff(img)
{
	if (document.images && imageOff[img])
	{
		document.images[img].src = imageOff[img].src;
	}
}