Simple jQuery timer. Usage: $('#timer').timer( 10, //duration of timer function(el){ //callback which will executed when time is up el.text('time is up!'); } )

timer

(function($){
    $.fn.timer = function(duration, callback) {
        var time = duration,
            element = this;

        element.text(time--);

        var interval = setInterval(function() {
            if(time < 0){
                clearInterval(interval);

                if(typeof callback === 'function'){
                    callback(element);
                }
            }else{
                element.text(time);
                time--;
            }
        }, 1000);
    };
})(jQuery);