var imagePreloadArray = new Array();

function preloadSesameWorkshopMainNav(){
	preloadImage('/new_global_nav/_template/images/header/nav_home_r.gif');
	preloadImage('/new_global_nav/_template/images/header/nav_insidetheworkshop_r.gif');
	preloadImage('/new_global_nav/_template/images/header/nav_initiatives_r.gif');
	preloadImage('/new_global_nav/_template/images/header/nav_programs_r.gif');
	preloadImage('/new_global_nav/_template/images/header/nav_aroundtheworld_r.gif');
	preloadImage('/new_global_nav/_template/images/header/nav_newsandevents_r.gif');
	preloadImage('/new_global_nav/_template/images/header/nav_supportus_r.gif');
	preloadImage('/new_global_nav/_template/images/header/nav_shop_r.gif');
	preloadImage('/new_global_nav/_template/images/header/nav_fundingpartners_r.gif');
	MM_preloadImages(imagePreloadArray);
}

function preloadImage(src){	
	imagePreloadArray.push(src);	
}

function MM_preloadImages(imgArray) { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=imgArray; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

// Array of muppet names which when combined with other pre and post strings point to image names and image rollovers.
var aMuppets = new Array('abby','bert','bigbird','cookie','count','elmo','ernie','grover','oscar','rosita','telly','zoe');
// Location of the images used in the header
var imagePath_Header = '/new_global_nav/_template/images/header/';
// Location of the images used in the workshop menu
//var imagePath_WorkshopMenu = '/new_global_nav/_template/images/workshopmenu/';
//var imagePreloadArray = new Array();
//
function preloadSesameStreetMainNav(){
    // List of rollover images and the muppet character images to preload
    preloadImage(imagePath_Header+'nav_games_r.gif');
    preloadImage(imagePath_Header+'nav_games_ra.gif');
    preloadImage(imagePath_Header+'nav_games_rb.gif');
    
    preloadImage(imagePath_Header+'nav_videos_r.gif');
    preloadImage(imagePath_Header+'nav_videos_ra.gif');
    preloadImage(imagePath_Header+'nav_videos_rb.gif');
    
    preloadImage(imagePath_Header+'nav_playlists_r.gif');
    preloadImage(imagePath_Header+'nav_playlists_ra.gif');
    preloadImage(imagePath_Header+'nav_playlists_rb.gif');
    
    preloadImage(imagePath_Header+'nav_mystreet_r.gif');
    preloadImage(imagePath_Header+'nav_mystreet_ra.gif');
    preloadImage(imagePath_Header+'nav_mystreet_rb.gif');
    
    for (i=0;i<aMuppets.length;i++){
	// Loops through the array of muppet names building an image location string
	preloadImage(imagePath_Header+'nav_muppets_'+aMuppets[i]+'.gif');
	preloadImage(imagePath_Header+'nav_muppets_'+aMuppets[i]+'_r.gif');
	preloadImage(imagePath_Header+'nav_muppets_'+aMuppets[i]+'_ra.gif');
	preloadImage(imagePath_Header+'nav_muppets_'+aMuppets[i]+'_rb.gif');
    }
    
    // bottom nav
    //preloadImage(imagePath_WorkshopMenu+'btnparents_r.gif');
    //preloadImage(imagePath_WorkshopMenu+'btnonair_r.gif');
    //preloadImage(imagePath_WorkshopMenu+'btnaboutus_r.gif');
    //preloadImage(imagePath_WorkshopMenu+'btnsearchgo_r.gif');
    //preloadImage(imagePath_WorkshopMenu+'btnpodcast_r.gif');
    
    MM_preloadImages(imagePreloadArray);
}

function preloadImage(src){
    imagePreloadArray.push(src);
}

function randomMuppet(){
    // Randomly picks a character name for the array of muppet names and then dynamically
    // replaces the Muppet class element with the chosen muppet class name.
    var nChoice = Math.floor(Math.random() * aMuppets.length);
    var muppet = aMuppets[nChoice];
    var element = document.getElementById('nav-muppets');
    element.className = muppet;
    return muppet;
}