/***********************************************
* 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 oneYear=60*60*24*365 //year unit in seconds
	var yearfield=Math.floor(timediff/oneYear)
	var dayfield=Math.floor((timediff-yearfield*oneYear)/oneDay)
	var hourfield=Math.floor((timediff-yearfield*oneYear-dayfield*oneDay)/oneHour)
	var minutefield=Math.floor((timediff-yearfield*oneYear-dayfield*oneDay-hourfield*oneHour)/oneMinute)
	var secondfield=Math.floor((timediff-yearfield*oneYear-dayfield*oneDay-hourfield*oneHour-minutefield*oneMinute))
	if (this.baseunit=="days"){ //if base unit is days, set "dayfield" to be topmost level
		dayfield=yearfield*365+dayfield
		yearfield="n/a"
	}
	else if (this.baseunit=="hours"){ //if base unit is hours, set "hourfield" to be topmost level
		hourfield=yearfield*365+dayfield*24+hourfield
		yearfield=dayfield="n/a"
	}
	else if (this.baseunit=="minutes"){ //if base unit is minutes, set "minutefield" to be topmost level
		minutefield=yearfield*365+dayfield*24*60+hourfield*60+minutefield
		yearfield=dayfield=hourfield="n/a"
	}
	else if (this.baseunit=="seconds"){ //if base unit is seconds, set "secondfield" to be topmost level
		var secondfield=timediff
		yearfield=dayfield=hourfield=minutefield="n/a"
	}
	var result={years: yearfield, days: dayfield, hours:hourfield, minutes:minutefield, seconds:secondfield}
	this.oncountup(result)
	setTimeout(function(){thisobj.start()}, 1000) //update results every second
}