/* (c) Michiel van der Blonk 2007
*/
    var running;
    var runningTime;
    var startTime;
    var endTime;

    function startTimer()
    {
        running = true;
        endTime = 0;
        startTime = new Date().getTime();
        document.forms[0].stop.focus();
        runTimer();
    }

    function stopTimer()
    {
        running = false;
        document.forms[0].reset.focus();
        endTime = runningTime;
        var lastSessionTime = parseInt(endTime/10) / 100;
		displayTime(endTime);
		document.forms[1].sessionTimes.value += lastSessionTime + ' ';
    }

    function resetTimer()
    {
        document.getElementById("timer").innerHTML = "00:00:00";
        document.forms[0].start.focus();
    }

	function runTimer()
	{
        runningTime = new Date().getTime() - startTime -3000;
        if (running)
            window.setTimeout("runTimer()", 10);
        displayTime(runningTime);
	}

    function displayTime(t)
    {
        var hundreds;
        var seconds;
        var minutes;

		if (endTime!=0)
			t = endTime;
        hundreds = parseInt(t / 10);
        seconds = parseInt(hundreds / 100);
        minutes = parseInt(seconds / 60);

        hundreds = hundreds % 100;
        seconds = Math.floor(seconds % 60);
        minutes = Math.floor(minutes % 60);

        if (runningTime<0)
        	document.getElementById("timer").innerHTML= seconds - 1;
		else
		{
			if (hundreds < 10)
				hundreds = "0" + hundreds;
			if (seconds < 10)
				seconds = "0" + seconds;

			document.getElementById("timer").innerHTML= minutes + ":" + seconds + "." + hundreds;
		}
    }