How to to disable right click using javascript?

Code to disable:

oncontextmenu="alert('right click is disable');return false;" 

now you may have doubt about placing this javascript code. This code should be in body as one of the attribute.

I think you can understand better if i give example.

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i think now you understand. 

see , this will disabled only for usual internet users. You can not protect it from hackers. We can disable javascript simply using webtool bar add on