Please help to optimize simple JQuery functions

Question

I have a such functions for jQuery:

$("input").focus(function () {
    $(this).addClass('focus');
});
$("input").blur(function () {
    $(this).removeClass('focus');
});

$("select").focus(function () {
    $(this).addClass('focus');
});
$("select").blur(function () {
    $(this).removeClass('focus');
});

$("textarea").focus(function () {
    $(this).addClass('focus');
});
$("textarea").blur(function () {
    $(this).removeClass('focus');
});

Is it possible to optimize, for a less code?

Answer 1

$("input,select,textarea").focus(function() {$(this).toggleClass('focus')})
                          .blur(function() {$(this).toggleClass('focus')});

or

$("input,select,textarea").bind('focus blur',function() {$(this).toggleClass('focus')});

Answer 2

This should work

$("input, textarea, select").focus(function () {
   $(this).addClass('focus');
}).blur(function(){
   $(this).removeClass('focus');
});