How to show local time?

Display local time using javascript...

<script type="text/javascript">
    function ShowTime()
    {
         var Time = new Date();

        var hours = Time .getHours();
        var minutes = Time .getMinutes();
        var seconds = Time .getSeconds();    
        var localTime= hours + " : " + minutes + " : " + seconds;
    }
</script>