<script type='text/javascript'>

                function create_target_date(){
                    var target_date = new Date();
                    target_date.setHours(23,59,59);
                    return target_date;
                }

                function calculation_timer(){
                    var target_date = create_target_date();
                    var current_date = new Date();
                    val_timer = target_date.getTime() - current_date.getTime();
                    var hours = Math.floor(val_timer/1000/60/60);
                    var minutes = Math.floor((val_timer-hours*60*60*1000)/1000/60);
                    var seconds = Math.floor(((val_timer-hours*60*60*1000)-minutes*60*1000)/1000);
                    document.getElementById('hours').innerHTML = hours;
                    document.getElementById('minutes').innerHTML = minutes;
                    document.getElementById('seconds').innerHTML = seconds;

                }
                            $(window).load(function(){
                                calculation_timer();
                                id_timer = setInterval(calculation_timer,1000);
                            })
    </script>