Prevent the backspace key from navigating back. (http://stackoverflow.com/questions/1495219/how-can-i-prevent-the-backspace-key-from-navigating-back)

disable_backspace.js

// Prevent the backspace key from navigating back.
$(document).unbind('keydown').bind('keydown', function (event) {
    var doPrevent = false;
    if (event.keyCode === 8) {
        var d = event.srcElement || event.target;
        if ((d.tagName.toUpperCase() === 'INPUT' && 
             (
                 d.type.toUpperCase() === 'TEXT' ||
                 d.type.toUpperCase() === 'PASSWORD' || 
                 d.type.toUpperCase() === 'FILE' || 
                 d.type.toUpperCase() === 'SEARCH' || 
                 d.type.toUpperCase() === 'EMAIL' || 
                 d.type.toUpperCase() === 'NUMBER' || 
                 d.type.toUpperCase() === 'DATE' )
             ) || 
             d.tagName.toUpperCase() === 'TEXTAREA') {
            doPrevent = d.readOnly || d.disabled;
        }
        else {
            doPrevent = true;
        }
    }

    if (doPrevent) {
        event.preventDefault();
    }
});