var show_time=true;
  var timerID=null;
  var browser = navigator.appName;

  function stop(){if (show_time){clearTimeout(timerID);
     document.clock.date_time.value=" ";}
     show_time=false;}
	 
  function start(form){var today=new Date();
     var display_value = "" + today.getDate() + ". "  +(today.getMonth()+1);
	 if (browser == "Microsoft Internet Explorer"){	 
	 display_value +=". "+ today.getYear();}
	 if (browser == "Netscape"){	 
	 display_value +=". "+ (today.getYear()+1900);}
     display_value +="   " + today.getHours()
     if(today.getMinutes() < 10){display_value+=":0" + today.getMinutes();}
     else{display_value+=":" + today.getMinutes();}
     if (today.getSeconds() < 10){display_value+=":0" + today.getSeconds();}
     else{display_value+=":" + today.getSeconds();}
     if(today.getHours()>=12){display_value+="  "}
     else{display_value+=""};
        document.clock.date_time.value=display_value;
        timerID=setTimeout("start()",100);
        show_time=true;}