1.新建一个aspx页面，删除前台代码，后台代码如下

try
                {
                    if (Request.QueryString["domains"] != null)
                    {
                        StringBuilder sb = new StringBuilder();
                        sb.Append("[");
                        foreach (string domain in Request.QueryString["domains"].Split(','))
                        {
                            WebRequest wr = WebRequest.Create("http://panda.www.net.cn/cgi-bin/check.cgi?area_domain=" + domain);
                            //wr.Timeout = 10000;
                            string strHtml = new StreamReader(wr.GetResponse().GetResponseStream()).ReadToEnd();
                            XmlDocument xd = new XmlDocument();
                            xd.LoadXml(strHtml);
                            XmlNode root = xd.SelectSingleNode("property");

                            sb.Append(",{\"returncode\":\"" + root.ChildNodes[0].InnerText + "\",\"key\":\"" + root.ChildNodes[1].
                                InnerText + "\",\"original\":\"" + root.ChildNodes[2].InnerText + "\"}");
                        }
                        sb.Append("]");
                        string s = sb.ToString().Replace("[,","[");
                        Response.Write(s);
                    }
                }
                catch (Exception ex)
                {
                    Response.Write(ex.ToString());
                }

2.通过jquery ajax的方式，调用前面新建的aspx页，如图

 $.ajax({
                    type: "get",
                    dataType: "json",
                    url: 'checkdomain.aspx',
     data: 'domains='+domains,//此处传递多个域名到checkdomain.aspx，以逗号分隔
     cache: false,
                    success: function (returndata) {
       $.each(returndata, function(i, n){
       //n.original
       //n.key
      })
                    }
                });

万网域名注册查询接口(API)说明