Display local date and time on the site using javascript

<div id="clock">&nbsp;</div>
<script type="text/javascript">
function init ( )
{
  timeDisplay = document.createTextNode ( "" );
  document.getElementById("clock").appendChild ( timeDisplay );
}
function updateClock ( )
{
  var currentTime = new Date ( );
  var currentHours = currentTime.getHours ( );
  var currentMinutes = currentTime.getMinutes ( );
  var currentSeconds = currentTime.getSeconds ( );
  var currentDay = currentTime.getDate ( );
 
  currentMinutes = ( currentMinutes < 10 ? "0" : "" ) + currentMinutes;
  currentSeconds = ( currentSeconds < 10 ? "0" : "" ) + currentSeconds;
 
  var timeOfDay = ( currentHours < 12 ) ? "AM" : "PM";
  currentHours = ( currentHours > 12 ) ? currentHours - 12 : currentHours;
  currentHours = ( currentHours == 0 ) ? 12 : currentHours;
var month_name=new Array(12);
month_name[0]="January"
month_name[1]="February"
month_name[2]="March"
month_name[3]="April"
month_name[4]="May"
month_name[5]="June"
month_name[6]="July"
month_name[7]="August"
month_name[8]="September"
month_name[9]="October"
month_name[10]="November"
month_name[11]="December"
  var currentTimeString = currentHours + ":" + currentMinutes + ":" + currentSeconds + " " + timeOfDay+"  "+  month_name[currentTime.getMonth()]+" "+currentDay+","+" " +currentTime.getFullYear();
  document.getElementById("clock").firstChild.nodeValue = currentTimeString;
//  document.getElementById("clock").style.fontWeight = 'bold';
}
</script>
<script>
updateClock( );
setInterval('updateClock()', 1000 );
</script>