Ext.tree.TreePanel的配置，半选，全选

[javascript]代码库

new Ext.tree.TreePanel({
                                        id:'tree_sq',
				        loader: new Ext.tree.TreeLoader({dataUrl:'./'+ORG_URL,baseParams:{userid:userid,groupid:groupid},
				        listeners:{
				                       load:function(ths,node){
				                        node.eachChild(function(child){
				                        if(child.attributes.checked){
					                        child.expand();
					                 }
				            });
				                    }
				                        	}
				                        }),
				                        lines:true,
				                        autoScroll:true,
				                        root: new Ext.tree.AsyncTreeNode({
				                            nodeType: 'async',
									   		text: '区域树',
									   		draggable: false,
									    	id: '0'
				                        }),
				                        rootVisible:false,
                                       listeners:{
                                            beforedblclick :function(n,e){
                                                e.stopEvent();
                                                return false;
                                            },
                                            click:function(node){
                                            	
                                            },
                                            checkchange:function(ths,checked){
                                            	checkAttrSyn(ths);
                                            	checkChilds(ths);
                                            	checkParent(this,ths);
                                        	},
                                        	beforeexpandnode:function(ths){
                                        		checkChilds2(ths);
                                        	}
                                        }
				                    })