Fix bug where fullscreen button was not displayed in IE.
Fix bug where fullscreen button was not displayed in IE.

mpetroff/pannellum,mpetroff/pannellum,psteph801/psteph801.github.io,psteph801/psteph801.github.io,mpetroff/pannellum,psteph801/psteph801.github.io,psteph801/psteph801.github.io,mpetroff/pannellum