gistfile1.txt

if (type == 'blah')
	var conditionalArea = {
		stuff: "nonsense"
	};
else {
	var conditionalArea = {
			fillColor: {
				linearGradient: [0, 0, 0, 300],
				stops: [
					[0, Highcharts.getOptions().colors[0]],
					[1, 'rgba(2,0,0,0)']
				]
			},
			lineWidth: 1,
			marker: {
			enabled: false,
			states: {
				hover: {
					enabled: true,
					radius: 5
					}
			        }
		},
		shadow: false,
		states: {
			hover: {
				lineWidth: 1
			}
		}
	}
}


{
	plotOptions: {
		area: conditionalArea,
		other: stuff
	}
}