<configuration>

    <system.web>

      <compilation debug="true" targetFramework="4.0" />

      <webServices>

        <protocols>

          <add name="HttpGet"/>

          <add name="HttpPost"/>

        </protocols>

      </webServices>

    </system.web>

  <system.webServer>

    <httpProtocol>

    <customHeaders>

      <add name="Access-Control-Allow-Methods" value="OPTIONS,POST,GET"/>

      <add name="Access-Control-Allow-Headers" value="x-requested-with,content-type"/>

      <add name="Access-Control-Allow-Origin" value="*" />

    </customHeaders>

  </httpProtocol>

  <modules>

    <add name="MyHttpModule" type="WebServiceDemo.MyHttpModule"/>

  </modules>

  </system.webServer>

</configuration>

<add name="Access-Control-Allow-Origin" value="http://domain1.com, http://domain2.com" />

function call2() {

            $.support.cors = true;

            $.ajax({

                url: "http://localhost:21179/WebService1.asmx/Test",

                type: "POST",

                dataType: "json",

                contentType: 'application/json',

                data: "{'user':{'Name':'aaa','Sex':'男','ID':1}}",

                success: function (d) {

                    alert("success! ");

                },

                error: function (e) {

                }

            });

        }