text: $(function () {
  	$('#container').highcharts({
  		title: {
  			text: 'Monthly Average Temperature',
  			x: -20 //center
  		},
  		subtitle: {
  			text: 'Source: WorldClimate.com',
  			x: -20
  		},
  		xAxis: {
  			//categories: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']
  		},
  		yAxis: {
  			title: {
  				text: 'Temperature (*C)'
  			},
  			plotLines: [{
  				value: 0,
  				width: 1,
  				color: '#808080'
  			}]
  		},
  		tooltip: {
  			valueSuffix: 'KB'
  		},
  		legend: {
  			layout: 'vertical',
  			align: 'right',
  			verticalAlign: 'middle',
  			borderWidth: 0
  		},
  		series: [{
  			name: 'Tokyo',
  			data: [7.0, 6.9, 9.5, 14.5, 18.2, 21.5, 25.2, 26.5, 23.3, 18.3, 13.9, 9.6]
  		}, {
  			name: 'New York',
  			data: [-0.2, 0.8, 5.7, 11.3, 17.0, 22.0, 24.8, 24.1, 20.1, 14.1, 8.6, 2.5]
  		}, {
  			name: 'Berlin',
  			data: [-0.9, 0.6, 3.5, 8.4, 13.5, 17.0, 18.6, 17.9, 14.3, 9.0, 3.9, 1.0]
  		}, {
  			name: 'London',
  			data: [3.9, 4.2, 5.7, 8.5, 11.9, 15.2, 17.0, 16.6, 14.2, 10.3, 6.6, 4.8]
  		}]
  	});
  
  	var randomVals = function( n ){
  		var arr = new Array( n );
  		for( var i=0; i<n; i=i+1 ){
  			arr[i] = Math.random()*300;
  		}
  		return arr;
  	}
  
  	// activate the button
  	$('#button').click(function () {
  		var chart = $('#container').highcharts();
  		var vals = randomVals(24);
  
  		chart.addSeries({
  			data: vals
  		});
  
  		//$(this).attr('disabled', true);
  	});
  
  });
  
  