// 加载Json文档
LoadJson=function(path,outFun,params){
	exy_wait();
	var conn=new Ext.data.Connection({
	  	autoAbort:false,
		method:'GET',
		timeout:30000,
		extraParams:params,
		url:path
	  });
	conn.request({
	  	success:function(response){
			var json_data=eval('('+response.responseText+')');
			var info={};
			var json_root=json_data['root'];
			//如果未定义root，直接返回
			if(typeof(json_root)=='undefined'){
				Ext.MessageBox.hide();
				outFun(false);
				return;
			}
			for(var key in json_data){
				if(key!='root') info[key]=json_data[key];
			}
			var fields=[];
			if(json_root.length>0){
				for(var key in info.map){
					fields.push(key);
				}
				var reader=new Ext.data.JsonReader({
					successProperty:'successProperty',
					totalProperty:'totalProperty',
					root:'root',
					id:'id'
				},fields);
				var store=new Ext.data.Store({
					proxy:new Ext.data.MemoryProxy(json_data),
					reader:reader,
					pruneModifiedRecords:true,
					count:json_data.totalProperty
				});
			
			}
			Ext.MessageBox.hide();
			outFun(store,info);
			if(json_data.totalProperty==0){
				exy_alert('提示','数据为空！');
				}
		},
		failure:function(){
		exy_alert('提示','获取信息超时或失败，请刷新页面后重试！');
		}
	  })
	};