Disable Eight Keyboard Features: No Numbers, No Upper Case, No Lower Case, No Alphabet, No Backspace, No Spacebar, No Delete, and No Enter Key. Press a button and the code is generated for you. The more keyboard options you disable, the more precision is brought to your HTML form content. For example, when visitors try to type in numbers when the form calls for letters only, they will enter nothing. How does it work? Keyboard Options generates JavaScript code that notifies the keyboard to turn off a keyboard option when your web page is displayed. Works in Internet Explorer, FireFox browsers and more.