JavaScript在浏览器标题栏上显示当前日期和时间

JavaScript在浏览器标题栏上显示当前日期和时间，将这段脚本放到head区即可

<script language="JavaScript">
<!--

// ***********************************************
// http://www.75271.com
// ***********************************************

function resetIt() {

// Calculate Time

var timerID = null;
var timerRunning = false;

if(timerRunning)
	clearTimeout(timerID);
	timerRunning = false;

// getTime
var timeNow = new Date();
var hours = timeNow.getHours();
var minutes = timeNow.getMinutes();
var seconds = timeNow.getSeconds();
var timeValue = "" + ((hours >12) ? hours -12 :hours)
timeValue = ((timeValue <10)? "0":"") + timeValue
timeValue += ((minutes < 10) ? ":0" : ":") + minutes
timeValue += ((seconds < 10) ? ":0" : ":") + seconds
timeValue += (hours >= 12) ? " PM" : " AM"
timerID = setTimeout("resetIt()",100);
timerRunning = true;


// getDate
var dateNow = new Date();
var days = new Array('Sunday','Monday','Tuesday','Wednesday','Thursday','Friday','Saturday');
var months = new Array('January','February','March','April','May','June','July','August','September','October','November','December');
var date = ((dateNow.getDate()<10) ? "0" : "")+ dateNow.getDate();
function y2k(number){return (number < 1000) ? number + 1900 : number;}

// compileIt
today =  timeValue + " " + days[dateNow.getDay()] + " " +
               months[dateNow.getMonth()] + ", " +
                date + " " +
                (y2k(dateNow.getYear()));

   if(document.all || document.getElementById){ // Browser Check
      document.title = today.toString();
   }else{
      self.status = today.toString(); // Default to status.
   }
}

resetIt();

//-->
</script>