// ROLLOVERS
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) {
		// MAIN MENU
		about_over = newImage("images/button_tab_about-over.gif");
		research_over = newImage("images/button_tab_research-over.gif");
		industry_over = newImage("images/button_tab_industry-over.gif");
		clients_over = newImage("images/button_tab_clients-over.gif");
		ourpeople_over = newImage("images/button_tab_ourpeople-over.gif");
		contact_over = newImage("images/button_tab_contact-over.gif");
		
		// LEFT MENU - RESEARCH
		left_menu_research_01_over = newImage("images/left_menu_research_01-over.gif");
		left_menu_research_02_over = newImage("images/left_menu_research_02-over.gif");
		left_menu_research_03_over = newImage("images/left_menu_research_03-over.gif");
		left_menu_research_04_over = newImage("images/left_menu_research_04-over.gif");
		left_menu_research_05_over = newImage("images/left_menu_research_05-over.gif");
		left_menu_research_06_over = newImage("images/left_menu_research_06-over.gif");
		
		// LEFT MENU - EXPERIENCE
		left_menu_experience_01_over = newImage("images/left_menu_experience_01-over.gif");
		left_menu_experience_02_over = newImage("images/left_menu_experience_02-over.gif");
		left_menu_experience_03_over = newImage("images/left_menu_experience_03-over.gif");
		left_menu_experience_05_over = newImage("images/left_menu_experience_05-over.gif");
		left_menu_experience_06_over = newImage("images/left_menu_experience_06-over.gif");
		left_menu_experience_07_over = newImage("images/left_menu_experience_07-over.gif");
		preloadFlag = true;
	}
}