function parseTime(t, l)
{
    return new Date(t.substr(0, 4) + "/" + t.substr(5, 2) + "/" + t.substr(8, 2) + " " + t.substr(11, 2) + ":" + t.substr(14, 2) + ":00 UTC" + ((l)?"+0000":t.substr(16, 5)));
}

function zeropadtime(t)
{
	if (t < 10)
	{
		t = "0"+t;
	}
	return t;
}
	

function getWeekdayName(i)
{
	switch (i)
	{
		case 0: return "Sun"; break;
		case 1: return "Mon"; break;
		case 2: return "Tue"; break;
		case 3: return "Wed"; break;
		case 4: return "Thu"; break;
		case 5: return "Fri"; break;
		case 6: return "Sat"; break;
    }
}

function switchTimeZones(anchor)
{
	var rLocal = false;
	
	if (anchor.name == 'race')
	{
		anchor.innerHTML = 'Convert to my local time';
		anchor.name = 'local';
		rLocal = true;
	}
	else
	{
		anchor.innerHTML = 'Back to race time';
		anchor.name = 'race';
	}
	
	var i = 0;
	var ttt;
	
	while ((obj = document.getElementById("tt"+(i++))) != null)
	{
		tttr = parseTime(obj.className, 1);
		tttu = parseTime(obj.className, 0);
		obj.innerHTML = "";
		
		if (rLocal)
		{
			obj.innerHTML += zeropadtime(tttr.getUTCHours()) + ":" + zeropadtime(tttr.getUTCMinutes());
		}
		else
		{
			if (tttr.getUTCDay() != tttu.getDay())
			{
				obj.innerHTML += "(" + getWeekdayName(tttu.getDay()) + ") ";
			}
			obj.innerHTML += zeropadtime(tttu.getHours()) + ":" + zeropadtime(tttu.getMinutes());
		}
	}
}