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_button_gallery_selected = newImage('media/button_gallery_selected.jpg');
		pre_button_studio_selected = newImage('media/button_studio_selected.jpg');
		pre_button_studio = newImage('media/button_studio.jpg');
		pre_button_services_selected = newImage('media/button_services_selected.jpg');
		pre_button_services = newImage('media/button_services.jpg');
		pre_button_news_selected = newImage('media/button_news_selected.jpg');
		pre_button_news = newImage('media/button_news.jpg');
		pre_button_info_selected = newImage('media/button_info_selected.jpg');
		pre_button_info = newImage('media/button_info.jpg');
		pre_button_english_selected = newImage('media/button_english_selected.jpg');
		preloadFlag = true;
	}
}