linux php下Ajax请求时URL路径出现重复

1. 项目用的YII框架，在module下面的Usertest.php有一个方法：

public function getTextArea($fieldName,$usertest_id) {    	      
        return CHtml::activeTextArea($this,$fieldName,array("name"=>$fieldName."_".$usertest_id,'style'=>'rows:3;cols:20;',"ajax" => array("type"=>"POST","url"=>"/usertest/ChangeComments", "data"=>array("usertest_id"=>$usertest_id,"usertest_comments"=>"js:this.value"),"success"=>"js:alert(\"Update comments success!\")")));     
    }

调用的地方在usertest/index.php里面，代码如下：

array(
        'name' => 'usertest_comments',
        'id' => 'usertest_comments',
        'header'=>'Comments',
       'type'=>'raw',
        'value'=>'$data->getTextArea(\'usertest_comments\',$data->usertest_id)',
        'htmlOptions'=>array('style'=>'width:100px;'),
       ),

开发在windows上，页面访问没有问题，访问路径是正确的： */usertest/ChangeComments