树的数据格式

var treeData={
			"电气":[{
				attributes:"department",
				iconCls:"icon-sum",
				id:"0,100",
				layer:"department",
				pid:"0",
				text:"区政府顶级节点",
				text_db:"区政府顶级节点（0，100）",
				children:[{
					attributes:"customer",
					iconCls:"icon-meter",
					id:"0,200",
					layer:"customer",
					pid:"0",
					text:"区政府二级节点",
					text_db:"区政府二级节点（0，200）",
					children:[{
						attributes:"customer",
						iconCls:"icon-meter",
						id:"0,300",
						layer:"customer",
						pid:"0",
						text:"区政府底层节点",
						text_db:"区政府底层节点（0，300）"
					}]
				},{
					attributes:"customer",
					iconCls:"icon-meter",
					id:"0,400",
					layer:"customer",
					pid:"0",
					text:"区政府二1级节点",
					text_db:"区政府二1级节点（0，400）",
					children:[{
						attributes:"customer",
						iconCls:"icon-meter",
						id:"0,500",
						layer:"customer",
						pid:"0",
						text:"区政府底层1节点",
						text_db:"区政府底层1节点（0，500）"
					}]
				}]
			}],
			"楼层":[{
				attributes:"department",
				iconCls:"icon-sum",
				id:"0,100",
				layer:"department",
				pid:"0",
				text:"区政府顶级节点",
				text_db:"区政府顶级节点（0，100）",
				children:[{
					attributes:"customer",
					iconCls:"icon-meter",
					id:"0,200",
					layer:"customer",
					pid:"0",
					text:"区政府二级节点",
					text_db:"区政府二级节点（0，200）",
					children:[{
						attributes:"customer",
						iconCls:"icon-meter",
						id:"0,300",
						layer:"customer",
						pid:"0",
						text:"区政府底层节点",
						text_db:"区政府底层节点（0，300）"
					}]
				},{
					attributes:"customer",
					iconCls:"icon-meter",
					id:"0,400",
					layer:"customer",
					pid:"0",
					text:"区政府二1级节点",
					text_db:"区政府二1级节点（0，400）",
					children:[{
						attributes:"customer",
						iconCls:"icon-meter",
						id:"0,500",
						layer:"customer",
						pid:"0",
						text:"区政府底层1节点",
						text_db:"区政府底层1节点（0，500）"
					}]
				}]
			}],
			"mptotal":10
		};