function cdtime(container, targetdate){
			if (!document.getElementById || !document.getElementById(container)) return
			this.container=document.getElementById(container)
			this.currentTime=new Date()
			this.targetdate=new Date(targetdate)
			this.timesup=false
			this.updateTime()
			}
			
			cdtime.prototype.updateTime=function(){
			var thisobj=this
			this.currentTime.setSeconds(this.currentTime.getSeconds()+1)
			setTimeout(function(){thisobj.updateTime()}, 1000) //update time every second
			}
			
			cdtime.prototype.displaycountdown=function(baseunit, functionref){
			this.baseunit=baseunit
			this.formatresults=functionref
			this.showresults()
			}
			
			cdtime.prototype.showresults=function(){
			var thisobj=this
			
			
			var timediff=(this.targetdate-this.currentTime)/1000 //difference btw target date and current date, in seconds
			if (timediff<0){ //if time is up
			this.timesup=true
			this.container.innerHTML=this.formatresults()
			return
			}
			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"
			}
			this.container.innerHTML=this.formatresults(dayfield, hourfield, minutefield, secondfield)
			setTimeout(function(){thisobj.showresults()}, 1000) //update results every second
			}
			
			/////CUSTOM FORMAT OUTPUT FUNCTIONS BELOW//////////////////////////////
			
			//Create your own custom format function to pass into cdtime.displaycountdown()
			//Use arguments[0] to access "Days" left
			//Use arguments[1] to access "Hours" left
			//Use arguments[2] to access "Minutes" left
			//Use arguments[3] to access "Seconds" left
			
			//The values of these arguments may change depending on the "baseunit" parameter of cdtime.displaycountdown()
			//For example, if "baseunit" is set to "hours", arguments[0] becomes meaningless and contains "n/a"
			//For example, if "baseunit" is set to "minutes", arguments[0] and arguments[1] become meaningless etc
			
			
			function formatresults(){
			if (this.timesup==false){//if target date/time not yet met
				var displaystring="Queda";

				if (arguments[0] > 1 || (arguments[0]==0 && arguments[1]>1))
					displaystring+="n";
			
				displaystring+=" ";
				if (arguments[0] != 0)
				{
					displaystring += arguments[0] + " d&iacute;a";
					if (arguments[0] > 1)
						displaystring += "s";
					displaystring += " ";
				}

				if (arguments[1] != 0)
				{
					displaystring += arguments[1] +" hora";
					if (arguments[1] > 1)
						displaystring += "s";
					displaystring += " ";
				}

				if (arguments[2] != 0)
				{
					displaystring += arguments[2] + " minuto";
					if (arguments[2] > 1)
						displaystring += "s";
					displaystring += " ";
				}
			//+" d&iacute;as, "+arguments[1]+" horas y "+arguments[2]+" minutos "
			}
			else{ //else if target date/time met
			var displaystring="de Erasmus en Skövde"
			}
			return displaystring
			}