http://www.dynamicdrive.com/dynamici...countingup.htm
revised for your need
Code:
<html>
<head>
<style style="text/css">
.dcountstyle{ /*Example CSS to style count up output*/
font: bold 16px Arial;
padding: 3px;
}
.dcountstyle sup{ /*Example CSS to style count up output*/
font-size: 90%
}
</style>
<script type="text/javascript">
/***********************************************
* Dynamic CountUp script- ?? Dynamic Drive (http://www.dynamicdrive.com)
* This notice MUST stay intact for legal use
* Visit http://www.dynamicdrive.com/ for this script and 100s more.
***********************************************/
function dcountup(startingdate, baseunit){
this.currentTime=new Date()
this.startingdate=new Date(startingdate)
this.timesup=false
this.baseunit=baseunit
this.start()
}
dcountup.prototype.oncountup=function(){} //default action for "oncountup"
dcountup.prototype.start=function(){
var thisobj=this
this.currentTime.setSeconds(this.currentTime.getSeconds()+1)
var timediff=(this.currentTime-this.startingdate)/1000 //difference btw target date and current date, in seconds
var oneMinute=60 //minute unit in seconds
var oneHour=60*60 //hour unit in seconds
var oneDay=60*60*24 //day unit in seconds
var dayfield=Math.floor(timediff/oneDay)
var hourfield=Math.floor((timediff-dayfield*oneDay)/oneHour)
var minutefield=Math.floor((timediff-dayfield*oneDay-hourfield*oneHour)/oneMinute)
var secondfield=Math.floor((timediff-dayfield*oneDay-hourfield*oneHour-minutefield*oneMinute))
if (this.baseunit=="hours"){ //if base unit is hours, set "hourfield" to be topmost level
hourfield=dayfield*24+hourfield
dayfield="n/a"
}
else if (this.baseunit=="minutes"){ //if base unit is minutes, set "minutefield" to be topmost level
minutefield=dayfield*24*60+hourfield*60+minutefield
dayfield=hourfield="n/a"
}
else if (this.baseunit=="seconds"){ //if base unit is seconds, set "secondfield" to be topmost level
var secondfield=timediff
dayfield=hourfield=minutefield="n/a"
}
var result={days: dayfield, hours:hourfield, minutes:minutefield, seconds:secondfield}
this.oncountup(result)
setTimeout(function(){thisobj.start()}, 1000) //update results every second
}
</script>
</head>
<body>
<div id="cpcontainer"> </div>
<script type="text/javascript">
//SYNTAX: myvariable=new dcountup(past_date_and_time_string, "baseunit")
var princewedding=new dcountup("April 9, 2005 13:30:00", "seconds")
princewedding.oncountup=function(result){
//result is an object containing the current count up date/time, updated every second
//Available properties: result["days"], result["hours"], result["minutes"], and result["seconds"]
var mycountainer=document.getElementById("cpcontainer")
mycountainer.innerHTML="Prince Charles and Camilla Parker have been married for: <br /><span class='dcountstyle'>"+result['seconds']+" <sup>seconds</sup></span>"
}
</script>
</body>
</html>