Hi I want to know about the schedule apex ? How to write the schedule apex classes?

I developed a visual force page that uses Angular JS and it works fine on Chrome and Firefox browsers.

It also works fine when running on IE at my house.

The problem is, when I run it on IE at my office, where we have a firewall, some of the script stop working.

Help , anyone ? 

Thanks!!

Hi I want to know about the schedule apex ? How to write the schedule apex classes?