function getBarChartDef() {
	// regular stuff:
	var chartDef = {};
	chartDef.titleColor = "#222222";
	chartDef.titleSize = 18;
	chartDef.background = {type: 'gradient', angle: 90, colors: [['#CCCCCC', 0], ['#FFFFFF', 100]]};
	chartDef.width = 600;
	chartDef.height = 501;
	chartDef.areaFill = {type: 'gradient', angle: 0, colors: [['#CCCCCC', 0], ['#FFFFFF', 100]]};
//	chartDef.legendPosition = "right";
//	chartDef.legendMargins = {horizontal: 10, vertical: 2};
//	chartDef.margins = {top: 10, left: 10, right: 10, bottom: 10};
//	chartDef.grid = {xAxisStepSize: 10, yAxisStepSize: 10, lengthOfLineSegment: 3, lengthOfBlankSegment:2, xOffset: 5, yOffset: 5};
	chartDef.title = "Stacked bar example:";
	chartDef.threeD = true;
	chartDef.horizontal = true;
	chartDef.barWidth = 20;
	chartDef.shadow = false;
//	chartDef.spaceBetweenGroupsOfBars = 15;
//	chartDef.spaceWithinGroupsOfBars = 3;
	chartDef.transparency = opacity;
//	chartDef.rangeMarkers = {orientation: 'h', color: '#00CCFF55', startPoint: 80, endPoint: 120};
	chartDef.markers = [{shape: 'arrow', size: 10, color: '#FF0000', x: 40, y: 50},
				{text: 'Bad year!', size: 12, x: 1, y: 40}];
	
	// here starts the interesting thing:
	
	// set as stacked:
//	chartDef.stacked = true;

	// set the values:
	var data1 = {data: [45,32,22,44,10], colors: ['#BB5555', '#DD3333', '#FF0000','#3333DD','#5555BB']};
//	var data2 = {data: [58,24,76], color: ['#00FFFF', '#FFFF00', '#00FF00'], legend: 'Stuff'};
//	var data3 = {data: [77,100,55], color: ['#5555BB', '#3333DD', '#0000FF'], legend: 'Rules!'};
	chartDef.bars = [data1]; //, data2, data3];
	
	// the sum of each bars by series will give (45+58+77=180, 32+24+100=156, 22+76+55=153)
	// we give the chart a max value of 200 to let it breathe ;)
	chartDef.maxValue = 60;
	
	// a simple x axis with 3 values (note the scaling):
	chartDef.yAxis = {
			labels: ['2008', '2009', '2010','2011','2012'],
			positions: [6, 15, 25, 35, 45],   // required for Google position (numbers must match how many labels you have) of label with marker attached
			style: {textColor: '#000000', fontSize: 12, alignment: 'right', drawTickMarks: true},
			minRange: 0, maxRange: 50
		};
	
	// and the y axis: the positions are scaled in a range of 0-100 anyway, so you can use [0,10...] or [0,20...] indiferently:
	chartDef.xAxis = {
			labels: ['0','10','20','30','40','50','60'],
			positions: [0, 10, 20, 30, 40, 50, 60],
			style: {textColor: '#000000', fontSize: 12, alignment: 'right', tickMarkLength: 12, tickMarkColor: '#FF0022'},
			minRange: 0, maxRange: 60
		};
	
	return chartDef;
}