extjs月度选择插件

Ext.namespace("ntbms")
ntbms.MonthPicker=Ext.extend(
	Ext.form.Field,
	{
		getValue:function(){
			var arr=this.el.query("select");
			var year=arr[0].value;
			var month=arr[1].value;
			return year+"-"+month;
		},
		/**value 格式2000-07*/
		setValue:function(value){
			if(Ext.type(value)=="date")
			{
				var year=value.getFullYear();
				var rawMonth=value.getMonth()+1;
				console.log(rawMonth);
				var month=null;
				if(rawMonth<10)
					month="0"+rawMonth;
				else
					month=rawMonth;
				var arr=this.el.query("select");
				arr[0].value=year;
				arr[1].value=month;
			}
			else
				throw new Error();
		},
		defaultAutoCreate:function(){
			var result={tag:"div",children:[]};
			var year={tag:"select",children:[]};
			for(var i=2000;i<=2040;i++)
			{
				year.children.push({
					tag:"option",
					value:i,
					html:i
				})
			}
			var month={tag:"select",children:[]};
			for(var i=1;i<=12;i++)
			{
				if(i<10)
					i="0"+i;
				month.children.push({
					tag:"option",
					value:i,
					html:i
				});
			}
			result.children.push(year);
			result.children.push({tag:"span",html:"年"});
			result.children.push(month);
			result.children.push({tag:"span",html:"月"});
			return result; 
		}()
	}
)
Ext.reg("ntbmsMonthPicker",ntbms.MonthPicker);