cursor is jumping when pressing the arrow keys

Question

I have a textbox, where a forbidden character cant be typed. #.

This works, however, when the textbox is filled in with data, and I put the focus on the middle of th

Answer 1

Just prevent the default action on keypress(keydown does not give consistent charCodes):

$('[id$=txtClient]').keypress(function (e) {
        if (String.fromCharCode(e.which) == '#'){
            e.preventDefault();
        }
});

This just prevents # and leaves the rest as it is.

Here you go;)