There will be cases when we may require to prevent backspace navigation in web pages.. This can be easily donw with javascript/jQuery using the following code. Just space this code in the scripts section of your code.
$(function
() {
        var rx
= /INPUT|TEXTAREA/i;
        $(document).bind("keydown keypress", function (e) {
            if
(e.which == 8) { // 8 == backspace
                if
(!rx.test(e.target.tagName) || e.target.disabled || e.target.readOnly) {
                    e.preventDefault();
                }
            }
        });
    })
 
