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) {
	
		b_news_over = newImage("images/b-news-over.jpg");
		b_learn_over = newImage("images/b-learn-over.jpg");
		b_design_over = newImage("images/b-design-over.jpg");
		b_friends_over = newImage("images/b-friends-over.jpg");
		b_contact_over = newImage("images/b-contact-over.jpg");
		b_info_over = newImage("images/b-info-over.jpg");
		b_export_over = newImage("images/b-export-over.jpg");
		b_map_over = newImage("images/b-map-over.jpg");
		
		top_b_home_over = newImage("img-info/top-b-home_over.jpg");
		top_lmb_over = newImage("img-info/top-lmb_over.jpg");
		left_recycle_over = newImage("img-info/left-recycle_over.jpg");
		arrow_lmb_over = newImage("img-info/arrow-lmb_over.jpg");
		arrow_vtour_over = newImage("img-info/arrow-vtour_over.jpg");
		arrow_locator_over = newImage("img-info/arrow-locator_over.jpg");
		arrow_whogets_over = newImage("img-info/arrow-whogets_over.jpg");
		arrow_recycle_over = newImage("img-info/arrow-recycle_over.jpg");
		right_vtour_over = newImage("img-info/right-vtour_over.jpg");
		right_locator_over = newImage("img-info/right-locator_over.jpg");
		bottom_locator_over = newImage("img-info/bottom-locator_over.jpg");
		bottom_whogets_over = newImage("img-info/bottom-whogets_over.jpg");
		bottom_recycle_over = newImage("img-info/bottom-recycle_over.jpg");
		
		/* b_home_over = newImage("images/news/b-home-over.jpg"); */
		/* b_news_back_over = newImage("images/news/b-back-over.jpg"); */
		/* b_news_next_over = newImage("images/news/b-next-over.jpg"); */
		
		preloadFlag = true;
	}
}


function open_popup(url, winName, winWidth, winHeight){
		window.open(url,winName,'toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=0,left='+centre(winWidth,screen.availWidth)+',top='+centre(winHeight,screen.availHeight)+',width='+winWidth+',height='+winHeight);
		}
		
function centre(size,area){return (area/2)-(size/2);
}

function rollOver(id,name){
  	if (document.images) document.getElementById(id).src = eval(name+".src");
}