Initializing experiment depending on browser

Hey,
I’ve read multiple questions to initializing experiment. Most of them speaking about the code components that are making problems.
Now my experiment works fine in Firefox and Safari, but not with Explorer. How could that be and is there an approved list of supported browsers?

What sorts of resources does your experiment use?

Any unusual code or components?

No nothing unusual. Just a few code components but nothing special.

Okay

Please could you show your Begin Experiment code components?