function settime () {
  var curtime = new Date();
  var curhour = curtime.getHours();
  var curmin = curtime.getMinutes();
  var cursec = curtime.getSeconds();
  var time = "";
  var clockspan = document.getElementById('clock');
  //alert(clockspan);
  var clockspan_textnode = clockspan.firstChild;
 
  if(curhour == 0) curhour = 12;
  time = (curhour > 12 ? curhour - 12 : curhour) + ":" +
         (curmin < 10 ? "0" : "") + curmin + ":" +
         (cursec < 10 ? "0" : "") + cursec + " " +
         (curhour > 12 ? "PM" : "AM");

  clockspan_textnode.data = time;
  
}


setInterval("settime()", 1000);