UHR

    <div id="clock">UHRZEIT!</div>
    <script>
        function setTime(){
            var d = new Date();

            var hours = d.getHours();
            if (hours.toString().length < 2){
                hours = "0" + hours;
            }

            var minutes = d.getMinutes();
            if (minutes.toString().length < 2){
                minutes = "0" + minutes;
            }

            var seconds = d.getSeconds();
            if (seconds.toString().length < 2){
                seconds = "0" + seconds;
            }

            document.getElementById("clock").innerHTML = hours+":"+minutes+":"+seconds;
        }
        setInterval(setTime,100);
    </script>