// Auto refresh ID
var intervalID;

// Sets the refresh time for graph.
function autoRefresh()
{
	if(document.getElementById('AutoRefresh').checked == true)
	{
		/* Clear interval already set/
		* This can happen if changing from different time frame e.g 12 hours is set then onclick will
		* set a new interval for the new time frame
		*/
		if(intervalID != undefined)
		{
			clearInterval(intervalID);
		}
		
		if (document.getElementById('timeScale').value == "Hour")
		{
			intervalID = setInterval(getTime, 10000);
		}
		else if (document.getElementById('timeScale').value == "12 Hours")
		{
			intervalID = setInterval(getTime, 30000);
		}
		else if (document.getElementById('timeScale').value == "Day")
		{
			intervalID = setInterval(getTime, 100000);
		}
		else if (document.getElementById('timeScale').value == "Week")
		{
			intervalID = setInterval(getTime, 500000);
		}
	}
	else
	{
		clearInterval(intervalID);
	}
}