How to disable browser back button of a particular child page (Master Page)

Question

I have a problem to disable a browser back button of a particular child page(Not all child pages of a master page).
No problem when i use in a separate page. I may use history.forward script to onload property of a body tag in a page.
but now i m using master page. that's why i dont know to implement the rule. Could you help me regarding this.

Advance thanks