功能介绍：在Magento前台表单中使用Ajax，表单输入信息验证通过，表单即可提交，验证不通过，表单就不能提交。

布局文件中添加需要加载的js文件：

        
     
      
       skin_js
      
      
       js/count.js
      
     
    

接下来，就需要写count.js文件：

skin/frontend/rwd/default/js/count.js

count.js内容为：

$j(document).ready(function(){    $j("[name=Serial_Number]").blur(function(){       var Serial_Number=$j("[name=Serial_Number]").val();       //alert(Serial_Number);           $j.ajax({          type:"post",          url:"/count/index/check",          data:"Serial_Number="+Serial_Number,          async:true,          success:function(msg){            $j("#span").html(msg);          }    });        });})function checkForm() {        //alert(123);        //var Serial_Number = document.getElementById("Serial_Number");        var span=document.getElementById("span");        //alert(span);        if (span.innerHTML == '序列号已存在' || span.innerHTML == '请输入正确的序列号')        {            //alert(span.innerHTML);            return false;        } else {            // Submit Form When All values are valid.            return true;        }    }

写ajax的时候，会写到url地址，这里，我把处理页面卸载IndexController中，

public function checkAction()    {        //接收参数        $Serial_Number = $this->getRequest()->getParam('Serial_Number');        //$model = Mage::getModel('count/count');             //查询数据库        $read = Mage::getSingleton("core/resource")->getConnection('core_read');        //$query="select count(*) from serial where serial_number='{$Serial_Number}'";        $query = $read->select()->from('serial')->where('serial_number = ?', $Serial_Number);        $result = $read->fetchOne($query);         if($result>0)        {            $read = Mage::getSingleton("core/resource")->getConnection('core_read');            $res = $read->select()->from('count')->where('serial_number = ?', $Serial_Number);            $row = $read->fetchOne($res);            if($row>0)            {                echo "序列号已存在";            }else{                echo "序列号正确";            }        }else{            echo "请输入正确的序列号";        }    }

到此，就完成了在magenot中加载自己写的ajax了。