;(function($){
    $.fn.extend({
        donetyping: function(callback,timeout){
            timeout = timeout || 1e3; // 1 second default timeout
            var timeoutReference,
                doneTyping = function(el){
                    if (!timeoutReference) return;
                    timeoutReference = null;
                    callback.call(el);
                };
            return this.each(function(i,el){
                var $el = $(el);

                $el.is(':input') || $el.is('textarea') && $el.on('keyup keypress',function(e){
                    var excludedKeys = [
                        16, 17, 18, 20, 35, 36, 37,
                        38, 39, 40, 45, 144, 225
                    ];
                    // This catches the backspace button in chrome, but also prevents
                    // the event from triggering too premptively. Without this line,
                    // using tab/shift+tab will make the focused element fire the callback.
                    if (e.type=='keyup' &&  $.inArray( e.keyCode, excludedKeys ) !== -1) return;

                    // Check if timeout has been set. If it has, "reset" the clock and
                    // start over again.
                    if (timeoutReference) clearTimeout(timeoutReference);
                    timeoutReference = setTimeout(function(){
                        // if we made it here, our timeout has elapsed. Fire the
                        // callback
                        doneTyping(el);
                    }, timeout);
                }).on('blur',function(){
                    // If we can, fire the event since we're leaving the field
                    doneTyping(el);
                });
            });
        }
    });
})(jQuery);