Backspace key issue in firefox

Question

I have an text box and applied Allow Alphabets With Space only using jquery. Its working in chrome But in firefox the backspace key is not working.

Answer 1

This should work in all [major] browsers:

$('#id1').keydown(function (event) {
    if (event.which == 8) {
        // ...
    } else {
        event.preventDefault();
    }
);

Note the use of keydown instead of keypress, which is essential for it to work.