function rollover(imgid, imgsrc) {
	$(imgid).src = imgsrc;
}

function popup (url, id, sizex, sizey) {
	if (! sizex) {
		sizex = 700;
	}
	if (! sizey) {
		sizey = 500;
	}
	window.open(url, 'window_' + id, 'height=' + sizey + ', width=' + sizex + ', menubar=no, status=yes, toolbar=no, location=no, scrollbars=yes');
}