how to use jquery to select all inputs, that are not submit, reset or button?

Try modifying your selector to chain .not(...) like:

var inputs = $('input, textarea, select')
                .not(':input[type=button], :input[type=submit], :input[type=reset]');

$(inputs).each(function() {
    console.log(this.type);
});

This makes it (arguably) easier to read, and should work how you expect.