Question

showActivity() khong tin thay

Answer 1

You are getting those errors because you are using fancybox v2.x with options for fancybox v1.3.x. The example page you are referring http://fancybox.net/blog is for version 1.3.4

Fancybox v2.x options are new and not compatible with previous versions.

In your case, instead of using

$.fancybox.showActivity(); //v1.3.x

you should use

$.fancybox.showLoading(); //v2.x

.... and instead of

$.fancybox.resize(); //v1.3.x

you should use

$.fancybox.update(); //v2.x