$('.nav-main img').preload({
    find: '_off.jpg',
    replace: '_on.jpg'
});

$('.nav-qc img').preload({
    find: '_off.jpg',
    replace: '_on.jpg'
});

$(document).ready(function(){
	submenucleanup = false;

	// Rollover Images
	$('.nav-main img,.nav-qc img').hover(
		function() {if($(this).hasClass('selected') == false) {src = $(this).attr('src'); $(this).attr('src',src.replace(/off\./,'on.')).css('cursor','pointer');}},
		function() {if($(this).hasClass('selected') == false) {src = $(this).attr('src'); $(this).attr('src',src.replace(/on\./,'off.'));}}
	);

	// Drop-down Menu
	/*$('#nav-play-sets, .nav-sub li, .nav-sub a').hover(
		function() {
			$('.nav-sub').css('display','block').css('cursor','pointer');
		},
		function() {
			clearTimeout(submenucleanup);
			submenucleanup = null;
			submenucleanup = setTimeout(
				function() {
					$('.nav-sub').css('display','none');
				}
				,1000
			);
		}
	);*/

    // Drop Down Menu: e-Media Resources 06.12.08
	var submenucleanup = false;
	// Main Menu Links
	$('#nav-play-sets').hover(
        function() {
            clearTimeout(submenucleanup);
            if($('.nav-sub').css('display') == 'none') {
            	$('.nav-sub').hide('fast');
            	$('.nav-sub').slideDown('fast').css('cursor','pointer');
			}
		},
		function() {
            clearTimeout(submenucleanup);
            submenucleanup = null;
			submenucleanup = setTimeout(
				function() {
					$('.nav-sub').slideUp('fast');
				}
				,400
			);
		}
	);
	// Sub Menu Links
    $(".nav-sub li").hover(
        function() {
			$(this).css('backgroundColor','#D2232A');
		},
		function() {
			$(this).css('backgroundColor','transparent');
		}
	);
	// Sub Menu Containers
    $(".nav-sub").hover(
        function() {
            clearTimeout(submenucleanup);
		},
		function() {
			clearTimeout(submenucleanup);
            submenucleanup = null;
			submenucleanup = setTimeout(
				function() {
					$('.nav-sub').slideUp('fast');
				}
				,400
			);
		}
	);

});