var os = (navigator.appVersion.indexOf ("Win", 0) != -1) ? "win" : "mac";
document.write ('<link rel="stylesheet" type="text/css" href="../common/css/' + os + '.css">');

function pop(url) {
w = window.open(url, 'pop','width=400,height=200,status=no,scrollbars=no,directories=no,menubar=no,resizable=yes,toolbar=no');
}