function preloadDetail( detail ) {
	document.img_detail = new Image;
	document.img_detail.src = detail;
	document.swap_url = detail;
	document.swap_text ='back';
}

function swapDetail() {
	var swap1 = document.art_img.src;
	var swap2 = swap_link.innerHTML;
	
	document.art_img.src = document.swap_url;
	swap_link.innerHTML = document.swap_text;
	document.swap_url = swap1;
	document.swap_text = swap2;
}