Magento 使用 ajax

 <button id="post_erp" onclick="callController()">提交到ERP</button>

        <?php
        $order_id = Mage::registry('sales_order')->getRealOrderId();

        ?>
            <script>
                var order_id = "<?php echo $order_id;?>";
                function callController(){
                    new Ajax.Request("<?php echo $this->getUrl('adminhtml/Sales_Order_Status/sendToErp') ?>", {
                        method: 'Post',
                        parameters: {"parameter_name":order_id},
                        onComplete: function(transport) {
                            //alert(transport.responseText);
                            if(transport.responseText == 'ok'){
                                alert('操作成功');
                            }    
                        }
                    });
                }
            </script>
        <?php endif?>