# How can I check if my app can go fullScren?

**URL:** <https://forum.kirupa.com/t/how-can-i-check-if-my-app-can-go-fullscren/266110>\
**Category:** flash\
**Created:** [July 16, 2008, 11:54am UTC](https://forum.kirupa.com/t/how-can-i-check-if-my-app-can-go-fullscren/266110 "2008-07-16T11:54:15Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![IlTimido](https://avatars.discourse-cdn.com/v4/letter/i/f1d935/32.png) [@IlTimido](https://forum.kirupa.com/u/IlTimido)\
**Post date:** [July 16, 2008, 11:54am UTC](https://forum.kirupa.com/t/how-can-i-check-if-my-app-can-go-fullscren/266110/1 "2008-07-16T11:54:15Z")

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I know that if I want my app go fullscreen I need to pass the parameter “allowFullScreen=true” from the HTML.  
But how can I test if that parameter has been passed and with what value?  
In other words, I need to know from my app If I can go fullscreen or not.  
Any idea?  
Thanks in advance