disable right click without notification


assalamualaikum .
another another tutorial (; 
- go to your Design > Edit HTML > Tick Expand Widget Templates
- search this code : </head> & paste this code bottom it : <body oncontextmenu='return false;'> & save it
- don't working ? try this one .search this ; 
<body>
-then , replaced the code to this ;
<body oncontextmenu='return false;'>
- end done finish .