function showbig(imagenumber) {
		var src, org;
		org = document.images[imagenumber].src;
		src=org.substring(0, org.length-9);
		src = src + "big.png";
		window.open(src,"BigWindow","location=no, menubar=no, resizable=yes, status=no,	toolbar=no, width=1220, height=700, scrollbars=yes");
		
}