dojo.xhrPost不发送任何数据

我刚进入Dojo并想尝试一个简单的AJAX Post，如examples在 Dojo的网站上。dojo.xhrPost不发送任何数据

下面是HTML/JS：

<form method="POST" id="addProjectForm"> 
<dl> 
    <dt>Project Name:</dt> 
     <dd><input dojoType="dijit.form.TextBox" id="projectName"></dd> 
    <dt>Project Description:</dt> 
     <dd><textarea dojoType="dijit.form.Textarea" id="projectDescription" style="width: 300px; height: 100px"></textarea></dd> 
</dl> 

<button dojoType="dijit.form.Button" style="float: right"> 
    Save Project 
    <script type="dojo/method" event="onClick"> 
     dojo.xhrPost({ 
      url: '/projects/add/', 
      load: function(data, ioArgs) { 
       alert(data); 
      }, 
      error: function(data, ioArgs) { 
       alert('There was an error'); 
      }, 
      form: 'addProjectForm' 
     }); 
    </script> 
</button> 
</form>

，并在后端我有以下几点：

class ProjectsController extends Zend_Controller_Action 
{ 
public function addAction() 
{ 
    $this->_helper->layout->disableLayout(); 
    $this->_helper->viewRenderer->setNoRender(true); 

    $projectName = $this->_request->getParam('projectName'); 
    $description = $this->_request->getParam('projectDescription'); 

    print_r($_POST); 
} 
}

当我点击 '保存项目' 按钮，我得到一个JS警告框与PHP输出一个空的数组，所以没有任何信息发布。我究竟做错了什么？

来源

2009-03-04 dragonmantank