[LayaAir 1.0]求问为什么找不到Laya这个问题?

最近利用Laya做了一个demo, 刚想建一个新类文件:EF_DataProtocol.js
结果报错:
ReferenceError: Laya is not defined

以下是index.html文件代码:

<!DOCTYPE html>

<html>

<head>

	<meta charset='utf-8' />

	<title>www.layabox.com</title>

	<meta name='viewport' content='width=device-width,initial-scale=1.0,minimum-scale=1.0,maximum-scale=1.0,user-scalable=no'

	/>

	<meta name="renderer" content="webkit"/>

	<meta name='apple-mobile-web-app-capable' content='yes' />

	<meta name='full-screen' content='true' />

	<meta name='x5-fullscreen' content='true' />

	<meta name='360-fullscreen' content='true' />

	<meta name="laya" screenorientation ="landscape"/>

	<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"/>

	<meta http-equiv='expires' content='0' />

	<meta http-equiv="Cache-Control" content="no-siteapp"/>

	

</head>

<body>

	<script type="text/javascript" src="libs/laya.core.js"></script>

    <script type="text/javascript" src="libs/laya.webgl.js"></script>

    <script type="text/javascript" src="libs/laya.ani.js"></script>

    <script type="text/javascript" src="libs/laya.filter.js"></script>

    <script type="text/javascript" src="libs/laya.html.js"></script>

    <script type="text/javascript" src="libs/laya.particle.js"></script>

    <script type="text/javascript" src="libs/laya.tiledmap.js"></script>

    <script type="text/javascript" src="libs/laya.ui.js"></script>

	<script src="js/ui/layaUI.max.all.js"></script>

	<script src="js/Main.js"></script>

</body>

</html>