jquery與zend framework編寫的聯動選項效果

html部分：

<script type="text/javascript" src="/js/jquery.js"></script><script type="text/javascript" src="/js/cxjl.js"></script><script type="text/javascript" src="/js/jquery_duoxuan1.js"></script>MYTITLE                                              

jquery部分：
<script type="text/javascript">$(document).ready(function(){//聯動下拉式功能表$("#college").load("/dyjsdp/college");$("#college").change(function(){$("#major").load("/dyjsdp/major","college="+$(this).val());});$("#major").change(function(){    $("#classes").load("/dyjsdp/class","major="+$(this).val());});});</script>

zend framework部分：
    //學院聯動    public function collegeAction(){        //header("Content-Type:text/html;charset=utf-8");        header("Cache-Control:no-cache");                $colleges=new College();        $res=$colleges->fetchAll();        echo "--請選擇學院--";        foreach ($res as $college){            echo "".$college['name']."";        }        exit();    }    //專業聯動    public function majorAction(){        //header("Content-Type:text/xml;charset=utf-8");        header("Cache-Control:no-cache");        $college=$this->getRequest()->getParam("college");        //file_put_contents("G:/php/myenv/mylog.log",$college);        $majors=new Major();        $db=$majors->getAdapter();        $sql=$db->quoteInto("select m.name from college c,major m where c.id=m.college_id and c.name=?", $college);        $res=$db->query($sql)->fetchAll();        echo "---請選擇專業---";        foreach ($res as $major){            echo "".$major['name']."";        }        exit();    }