ion () {
		console.log('开始渲染列表');
		bindEvent();
	};
	render();

	render();
	render();

	var bindEvent = getSingle(function () {
		document.getElementById('div1').onclick = function () {
			alert('click');
		}
		return true;
	});
	var render = function () {
		console.log('开始渲染列表');
		bindEvent();
	};
	render();
	render();
	render();

</script>