Uncaught ReferenceError: Mage is not defined

[hgati]

javascript error on admin screen.

[hgati]

I've solved.
http://magento.stackexchange.com/questions/105068/mage-cookies-clear-not-working

The function called Mage is not used anywhere in core Magento, probably that's why nobody noticed it was broken for 8 years.

1. Fixed the function called Mage. - /js/cookies.js
   

2. Add the fuction mage into adminhtml layout
   

[Ejilarasan]

2.Add the function mage into adminhtml layout.

Can you describe the exact file where to edit the step2?.

[hgati]

I wrote that code in my own custom module.