On alert box message grey page need to disable all keyboard characters except enter
Have written a code to disable backspace key in fire fox , its working fine and displaying alert correct alert box. Whenever alert box is getting displayed , i am pressing again back space key then it is going to previous page. So need to disable the backspace key on alert pop up also..
In chrome browser all keyboard characters are disabled except enter key..
so expecting the same thing in Firefox also..
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Perhaps Firefox allows the Back button -- the backspace key is equivalent to the Back button -- because users do not like being trapped by dialogs?
Have you considered handling this event: window.onbeforeunload?
Edit: Updated documentation: beforeunload
Τροποποιήθηκε στις από τον/την jscher2000 - Support Volunteer
Note that Firefox has a build-in way to disable the backspace key.
Thanks for your reply..
In beforeunload function i am unable get the event code.. wrote alert box for event keycode getting message as undefined
Need to disable following pop up (Please check attached image)
Your existing function could set a global flag that you check in the function that runs onbeforeunload; does that work?
I'm not aware of any way to get rid of the dialog.