Get post data, Zend Framework

[getgo]

I want to fetch posted data. But I am using no form. The data is postet by a jquery script with method \[code\]post\[/code\] and I would like to fetch it. I know how to fetch parameters\[code\]$id = $this->getRequest ()->getParam ( 'id', null );\[/code\]and form values\[code\]$message = $form->getValue ( 'message' );\[/code\]however I want to access post data and not parameters or form values. Any ideas?