jquery与zend framework编写的联动选项效果

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


    

       
                 
           
              
          	       ---请选择学院---
              
              
			       ---请选择专业---
		                               
              
            
       


jquery部分：
<script type="text/javascript">
$(document).ready(function(){
	//联动下拉菜单
	$("#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：
    //学院联动
    public function collegeAction(){
        //header("Content-Type:text/html;charset=utf-8");
        header("Cache-Control:no-cache");
        
        $colleges=new College();
        $res=$colleges->fetchAll();
        echo "--请选择学院--";
        foreach ($res as $college){
            echo "".$college['name']."";
        }
        exit();
    }
    //专业联动
    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 "---请选择专业---";
        foreach ($res as $major){
            echo "".$major['name']."";
        }
        exit();
    }