function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImagesArray(array) {
	if (preloadFlag == true) {
		var d = document; var img;
		for (var i=0; i<array.length; i+=2) {
			img = null; var n = array[i];
			if (d.images) {img = d.images[n];}
			if (!img && d.getElementById) {img = d.getElementById(n);}
			if (img) {img.src = array[i+1];}
		}
	}
}

function changeImages() {
	changeImagesArray(changeImages.arguments);
}


var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		pre_nav_1_about_kula_on = newImage('img/nav-1-about-kula-on.gif');
		pre_nav_2_teachers_on = newImage('img/nav-2-teachers-on.gif');
		pre_nav_3_class_types_on = newImage('img/nav-3-class-types-on.gif');
		pre_nav_4_schedule_on = newImage('img/nav-4-schedule-on.gif');
		pre_nav_5_kulamigos_on = newImage('img/nav-5-kulamigos-on.gif');
		pre_nav_6_workshops_on = newImage('img/nav-6-workshops-on.gif');
		pre_nav_7_events_on = newImage('img/nav-7-events-on.gif');
		pre_nav_8_photos_on = newImage('img/nav-8-photos-on.gif');
		pre_nav_8_contact_us_on = newImage('img/nav-8-contact-us-on.gif');
		pre_nav_10_home_on = newImage('img/nav-10-home-on.gif');
		preloadFlag = true;
	}
}