Ext 查询控件

var findNurseList = function(){
				if(document.readyState != "complete")
					return;
				nurseAccountService.getNurseContactList({
					callback:function(data){
						nurseData = [];
					    if(data == null)
					    	return;
					    for(var i =0;i<data.length;i++){
					    	var sameflag = true;
					    	for(var j=0;j<nurseData.length;j++){
								if(data[i].emp_id != null &&  data[i].emp_id == nurseData[j].emp_id){
									sameflag = false;
								}
							}
							if(sameflag)
							 	nurseData[nurseData.length] = data[i];
						}
						initComboBox();
					}.createDelegate(this),
					exceptionHandler: function() {
						HelixMsg.alert(HelixMsg.ERROR, '', '加载失败');
					}.createDelegate(this)
				});
			   var str = Ext.get('nurse_id').dom.innerHTML;
			   window.mailWriter.writer.$receiverDiv.css("border","0px");
			   window.mailWriter.writer.$receiverDiv.html(str);
			 }


/**
			 *初始化下拉框
			 */
			 var initComboBox = function(){
				var ds = new Ext.data.JsonStore({
					data:{root:nurseData}, 
					root:'root',
			        fields:[
							{name: 'user_id', mapping: 'nurse_sn'},
							{name: 'name', mapping: 'name'},
							{name: 'group_name', mapping: 'group_name'},
							{name: 'name_in_pinyin', mapping: 'name_in_pinyin'},
							{name: 'emp_id', mapping: 'emp_id'}
						] 
				});
				
				// 显示的样式
				var resultTpl = new Ext.XTemplate(
					'<tpl for="."><div class="search-item">',
						'<table><tr><td width="80px">{name}</td><td>{group_name}</td></tr></table>',
					'</div></tpl>'
				);
				
				search = new Ext.form.ComboBox({
					store: ds,
					displayField:{fn:function(r){
						var value = search.getValue();
						var flag = false;
						value = this.data.createValueMatcher(value);
						if(r.data['name_in_pinyin'] != null)
							flag = value.test(r.data['name_in_pinyin']);
						if(!flag)
							flag = value.test(r.data['name']);
						return flag;
					}},
					typeAhead: false,
					mode: 'local',
					loadingText: 'Searching...',
					width: 435,
					minChars : 1,
					hideTrigger:true,
					applyTo: 'nurse_list',
					tpl:resultTpl,
					itemSelector: 'div.search-item',
					onSelect : function(record, index){
				        if(this.fireEvent('beforeselect', this, record, index) !== false){
				        	var emp_id = record.data['emp_id'];
				        	var name = record.data['name'];
				        	if(emp_id == null){
				        		HelixMsg.alert(HelixMsg.ERROR, '', name+"没有账号,不能接收邮件。");
				        		return;
				        	}
				        	window.mailWriter.writer.$receiverId.val(emp_id);
				        	window.mailWriter.writer.$receiverName.text(name);
				            this.setValue(name);
				            this.collapse();
				            this.fireEvent('select', this, record, index);
				        }
			    	}
				});
			};