var Tree = Ext.tree;
				Ext.BLANK_IMAGE_URL = "../images/s.gif";
				Ext.EventManager.onDocumentReady(function() {
				tree = new Ext.tree.TreePanel('tree-div', {
					animate:true,					
					enableDD:false,
					containerScroll: true,
					lines:false,					
					rootVisible:true,
					loader: new Ext.tree.TreeLoader({dataUrl:'../treeNode.shtml'})
				});
			
				// set the root node
				var root = new Ext.tree.AsyncTreeNode({
					text: '点击展开诊疗科目',
					allowDrag:false,
			        allowDrop:false,    
					id:'source'
				});
				tree.setRootNode(root);
				
				tree.on('beforeload',function(node){
						//alert(node.attributes.depth);
						if(node.attributes.depth == '0'){
							tree.loader.dataUrl = "../zlkmTreeInit.shtml";
						}
				    	if(node.attributes.depth == '1'){
				    	//alert(node.attributes.subjectCode);
							tree.loader.dataUrl = "../treeJunior.shtml?pid="+node.attributes.subjectCode;
						}
						if(node.attributes.depth == '2'){
						tree.loader.dataUrl = "#";
						}
					});
				
				tree.on('dblclick',function(node){ 
					//把所选栏目的code设置到hidden元素中
					var mySelValue=node.attributes.subjectCode;
	    			returnValue=mySelValue;
					//alert(mySelValue);
					//alert('您选择了 "'+node.text+'" 作为查询条件');  
					document.getElementById("trvalue").value += ","+returnValue;	
					var insNames = document.getElementById("zlkm") ;
					//alert("=="+insNames.value);
					if(insNames.value==""||insNames.value==null){
						insNames.value += node.text; 
					}else{
						insNames.value += (","+node.text); 
					}
				});	
				// render the tree				
				tree.render();
			});