var serverDate;


	function tick(){
	   serverDate.setSeconds(serverDate.getSeconds()+1);  
	   var min = serverDate.getMinutes();
	   if (min < 10) min="0"+min;
	   var sec = serverDate.getSeconds();
	   if (sec < 10) sec="0"+sec;
	   document.getElementById("orologio").innerHTML  = serverDate.getHours() + ":" + min + ":" + sec;
	}