function getFileExtension(filename) {
return (/[.]/.exec(filename)) ? /[^.]+$/.exec(filename)[0] : undefined;
}
getFileExtension(document.location.href);
function getFileExtension(filename) {
return (/[.]/.exec(filename)) ? /[^.]+$/.exec(filename)[0] : undefined;
}
getFileExtension(document.location.href);