dojo.xhrPost不發送任何數據

我剛進入Dojo並想嘗試一個簡單的AJAX Post，如examples在 Dojo的網站上。dojo.xhrPost不發送任何數據

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>

，並在後端我有以下幾點：

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); 
} 
}

當我點擊 '保存項目' 按鈕，我得到一個JS警告框與PHP輸出一個空的數組，所以沒有任何信息發佈。我究竟做錯了什麼？

來源

2009-03-04 dragonmantank