ceholder").bind("plothover", function (event, pos, item) {
		if (item) {
			if (previousPoint != item.datapoint) {
				previousPoint = item.datapoint;
				
				$("#hovertip").remove();
				var y = item.datapoint[1];
				
				showTooltip(item.pageX, item.pageY, y + 'Â°C');
			}
		}
		else {
			$("#hovertip").remove();
			previousPoint = null;            
		}
	});
	$("#clearSelection").click(function () {
		$.plot($("#flotPlaceholder"), fh_data, options);
		$('#clearSelection').hide();
	}