wysiwyg editor remove allowfullscreen from iframe in magento

Hello Friends,

Today  I want to saw you that how to add "allowfullscreen" or other attribute in TinyMCE for iframe.

Basically i want to allow "allowfullscreen" to TinyMCE html editor for magento and I also searched this on Google but not found the any solution. so i start to check the tiny_mce.js. and i got the one code and add this attribute in that code. let me share the code for you. so, you can fix this issue yourself.

I tried this for the magento Tiny_Mce but i think this for all framework and cms.