1. parameter
Code:
Definition1 : {
                ...
		includeLegend: "false",
		urlTemplate: "javascript:alert('{AREA1}')",
		parameterName: "AREA1",
                ...
		}

Definition2 : {
                ...
		includeLegend: "false",
		urlTemplate: "javascript:alert('{AREA2}')",
		parameterName: "AREA2",
                ...
		}
Above are two chars definitions, I think it will be this:i click chart1 and value of AREA1 will be displayed , click chart2 will display value of AREA2. However i found no matter which chart i clicked , result(pop window) always is the value of AREA1. why this happen ?

2.orientation: no matter is vertical or horizontal, it will always be vertical.