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JavaScript Code

$('#start_timer').click(function(event)
	{
 
		var actual_time = event.timeStamp;
		var end_time = actual_time + 1800000;
		var hours = 0, minutes = 0, seconds = 0;
 
		//Falls die Seite verlassen wurde
		if($.cookie('endtime_bc4Y78PI6RT3') != null)
		{
			end_time = $.cookie('endtime_bc4Y78PI6RT3');
		}
 
		else
		{
			$.cookie('endtime_bc4Y78PI6RT3', end_time, {expires: 365, path: '/'});
		}
 
		//Differenz in Millisekunden
		var diff = end_time - actual_time;
 
		alert(end_time+' - '+actual_time+' = '+diff);
 
		//Wenn der aktuelle Zeitpunkt größer als der end-Time-Punkt ist
		if(diff < 1)
		{
			alert('Job fertig');
		}
 
		//Umrechnung von Millisekunden in Stunden/Minuten/Sekunden
		else
		{
			while(diff > 3600000)
			{
				hours++;
				diff = diff - 3600000;
			}
 
			while(diff > 60000)
			{
				minutes++;
				diff = diff - 60000;
			}
 
			while(diff > 1000)
			{
				seconds++;
				diff = diff - 1000;
			}
 
			$('title').text(hours+':'+minutes+':'+seconds);
		}
 
	});