可参考官方教程：http://dojotoolkit.org/documentation/tutorials/1.7/hello_dojo/
教程里主要定义了两个方法，setText设置文本内容和restoreText重置文本内容。
这两个方法通过dojo.define这个方法来定义。
// In
demo/myModule.js (which means this code defines// the
"demo/myModule" module):define([ // The dojo/dom module is required by this
module, so it goes // in this list of
dependencies. "dojo/dom"],
function(dom){ // Once all modules in the dependency list
have loaded, this // function is called to define the
demo/myModule module. // // The dojo/dom module is passed as the
first argument to this // function; additional modules in the
dependency list would be // passed in as subsequent
arguments. var oldText =
{}; // This returned object becomes the defined
value of this module return { setText:
function(id, text){ var node =
dom.byId(id); oldText[id] =
node.innerHTML; node.innerHTML =
text; }, restoreText:
function(id){ var node =
dom.byId(id); node.innerHTML =
oldText[id]; delete
oldText[id]; } };});
define 方法引用了必要的类，就像java 中的
import；并且还包含了对业务逻辑的实现，
并通过return来返回，以上就是myModule.js文件的全部内容。
那么在html页面里，通过dojo.require来加载上面的js代码，
//
Require the module we just createdrequire(["demo/myModule"],
function(myModule){ // Use our module to change the text in the
greeting myModule.setText("greeting",
"Hello Dojo!"); // After a few seconds, restore the text to
its original state setTimeout(function(){ myModule.restoreText("greeting"); }, 3000);});在这里暂且先总结为：dojo.define 方法仅用于定义和声明，dojo.require 方法仅用于异步加载js文件