ext+struts2.0 同一个action 多个方法 异步问题

Ext.Ajax.request(
{
url : 'rightAction!methodXX1.action',
}
)

Ext.Ajax.request(
{
url : 'rightAction!methodXX2.action',
}
)

Ext.Ajax.request(
{
url : 'rightAction!methodXX3.action',
}
)

Wsd.web.chart = function() {
	var w = 100;
	var h = 230;
	var obj = document.getElementById('web-area-container');
	w = obj.offsetWidth;
	w = w / 3;
	// 区域
	this.showChart(w, h, 'wtoEMsColAction!GZtoGD.action', 'GZtoGD',
			'MSColumn3D.swf');
	this.showChart(w, h, 'wtoEMsColAction!YNtoGD.action', 'YNtoGD',
			'MSColumn3D.swf');
	this.showChart(w, h, 'wtoEMsColAction!GXtoGD.action', 'GXtoGD',
			'MSColumn3D.swf');

	// 地域
	var obj = document.getElementById('web-factory-container');
	w = obj.offsetWidth;
	w = w / 3;
	this.showChart(w, h, 'wtoEMsColAction!tianYi.action', 'tianYi',
			'MSColumn3D.swf');
	this.showChart(w, h, 'wtoEMsColAction!tianEr.action', 'tianEr',
			'MSColumn3D.swf');
	this.showChart(w, h, 'wtoEMsColAction!longTan.action', 'longTan',
			'MSColumn3D.swf')；

}
Wsd.web.chart.prototype = {
	showChart : function(w, h, url, chartId, swf) {
		var xmlStr = Wsd.golob.Synchronize(url);
		var chart = new FusionCharts('../scripts/fusionCharts/swf/' + swf,
				chartId + '_flash', w, h, '0', '0');
		chart.setDataXML(xmlStr);
		chart.setTransparent(true);
		chart.render(chartId);
	}

}

//自己定义一个同步的方法。作为全局的方法使用
Wsd.golob.Synchronize = function(url) {
	function createXhrObject() {
		var http;
		var activeX = ['MSXML2.XMLHTTP.3.0', 'MSXML2.XMLHTTP',
				'Microsoft.XMLHTTP'];
		try {
			http = new XMLHttpRequest();
		} catch (e) {
			for (var i = 0; i < activeX.length; ++i) {
				try {
					http = new ActiveXObject(activeX[i]);
					break;
				} catch (e) {
				}
			}
		} finally {
			return http;
		}
	};

	var conn = createXhrObject();
	conn.open("GET", url, false);
	conn.send(null);
	if (conn.responseText != '') {
		var returnVal=conn.responseText;
		if (returnVal.indexOf("Session Expired") != -1) {//判断session超时
			new Wsd.golob.Redirect();
		} else {
			return returnVal;
		}

	} else {
		return null;
	}
};