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

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		btn_home_over = newImage("images/nav/btn_home-over.gif");
		btn_sidran_over = newImage("images/nav/btn_sidran-over.gif");
		btn_news_over = newImage("images/nav/btn_news-over.gif");
		btn_training_over = newImage("images/nav/btn_training-over.gif");
		btn_resources_over = newImage("images/nav/btn_resources-over.gif");
		btn_store_over = newImage("images/nav/btn_store-over.gif");
		btn_help_over = newImage("images/nav/btn_help-over.gif");
		btn_press_over = newImage("images/nav/btn_press-over.gif");
		btn_projects_over = newImage("images/nav/btn_projects-over.gif");
		btn_links_over = newImage("images/nav/btn_links-over.gif");
		btn_contact_over = newImage("images/nav/btn_contact-over.gif");
			history_over = newImage("images/history-over.gif");
		philosophy_over = newImage("images/philosophy-over.gif");
		programs_over = newImage("images/programs-over.gif");
		boards_over = newImage("images/boards-over.gif");
		staff_over = newImage("images/staff-over.gif");
		funders_over = newImage("images/funders-over.gif");
		annual_report_over = newImage("images/annual_report-over.gif");
		books_over = newImage("images/books-over.gif");
		audio_visual_over = newImage("images/audio_visual-over.gif");
		assessment_tools_over = newImage("images/assessment_tools-over.gif");
		newsletters_over = newImage("images/newsletters-over.gif");
		home_study_over = newImage("images/home_study-over.gif");
		bargains_over = newImage("images/bargains-over.gif");
		free_materials_over = newImage("images/free_materials-over.gif");
		donate_over = newImage("images/donate-over.gif");
		about_store_over = newImage("images/about_store-over.gif");
		workshops_over = newImage("images/workshops-over.gif");
		preloadFlag = true;
	}
}