function showPic (which, picWidth, picHeight, caption) {
openString = "width=" + picWidth + ",height=" + picHeight + ",screenX=55,screenY=55,scrollbars=no,menubar=no,location=no,status=no";
picWin = window.open('','picWin',openString);
picWin.document.write('');
picWin.document.write('
');
picWin.document.write(caption + '
');
picWin.document.write('C L O S E
');
return;
}