Question

I am looking for a simple maybe JS to forbid apostrophe onKeyUp or OnKeyPress kind of thing. For ex, every time user presses a key if it was apostrophe (Jame’s Pizza) replace it with space. I don’t want to process it in PHP
I found a code but it ties the JS to the textfield Name which I don’t want. I need something global,

Answer 1

It’s always better to prevent the keystroke than to retroactively delete it. To accomplish this, you need to intercept the keypress event (keyup is too late):

document.getElementById('yourTextBoxID').onkeypress = function () {
    if (event.keyCode === 39) { // apostrophe
        // prevent the keypress
        return false;
    }
};​

http://jsfiddle.net/TSB9r/

If you only want to stop the ' from appearing in the box but would like the keypress event to propagate to parent elements, replace the return false; with event.preventDefault();. (suggested by Eivind Eidheim Elseth in the comments)