regex - How do I exclude "%" and "_"?

Question

Im allowing numbers, letters, and special characters except for % and _ in my html textbox. I have the pattern /[a-zA-Z0-9!@#$^&*()-+=]/. I think its not the best way to do it because I have to list all special characters except the two mentioned. Is there a way in which I don't have to list all special characters and don't include the two mentioned? BTW, Im using javascript regex.

For the demo please see http://jsfiddle.net/ce8Th/

Please help.

Answer 1

There's no need for that complex loop. Just call replace directly on the whole string:

$(this).val(function (i, v) {
    return v.replace(/%|_/g, '');
});

Here's your fiddle: http://jsfiddle.net/ce8Th/1/