Strávený čas na stránce

<form name="hours" style="width:200px; action:; color:lime; font-size:17; text-align:center" method="post">
	  Čas na stránce: <input type="text" size="4" name="elapsed" style="border-width:0px; color:lime; font-size:17; text-align:right; background-color: 		transparent;" readonly='readonly' />
	</form>
<script type="text/javascript">
	<!--
	var Arrived = new Date(0,0,0,0,0,0)

	function SetDate( objDate, field, fShowDate ){

	var minutes=objDate.getMinutes()
	var seconds=objDate.getSeconds()

	var strDate = 0
	
		if (minutes<=9)
			minutes="0"+minutes
		if (seconds<=9)
			seconds="0"+seconds

		field.value= ( fShowDate ? ( strDate + ",  " ) : "" ) +minutes+":" +seconds 
	}

	function Clock(){
	var currentDate = new Date()

		// Inkrementujeme cas od vstupu o sekundu
		Arrived.setTime( Arrived.getTime() + 1000 );

		SetDate( Arrived, document.hours.elapsed, 0 );
	
		setTimeout("Clock()",1000)
	}
	Clock()
	//-->
	</script>