<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">

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>

<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", "days")

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['days']+" ^days "+result['hours']+" ^hours "+result['minutes']+" ^minutes "+result['seconds']+" ^seconds</span>"
}

</script>

princewedding.oncountup=function(result){
    //Define action to take as script counts up each second
    //Available properties: result["days"], result["hours"], result["minutes"], and result["seconds"]
}

<div id="cpcontainer"> </div>

<script type="text/javascript">

princewedding.oncountup=function(result){
    var mycountainer=document.getElementById("cpcontainer")
    mycountainer.innerHTML="Prince Charles and Camilla Parker have been married for:"+ result['days']+" days "+result['hours']+" hours "+result['minutes']+" minutes "+result['seconds']+" seconds"
}

</script>