Jquery Webservice in ASP.NET

I am working with ASP.NET 4.0 framework. In one web page, I have to call web service using Jquery as

     var serviceurl = 'http://www.websitename.com/webservicename';
         $.ajax({
                type: "POST",
                url: serviceurl + 'WebServiceName',
                data: "{'Parameters': '" + parameter+ "'}",
                contentType: "application/json; charset=utf-8",
                dataType: "json",
                success: function (msg) {
                    ShowAfterSuccess(msg);
开发者_StackOverflow中文版                },
                error: AjaxFailed
            });

It works fine, if i mention url as "http://www.websiteName.com" but when i put URL as "websitename.com" it doent call webservice. but it works well only in Google Chrome with "websiteName.com" I dont knw what is the issue with that....whether there is problem in my webservice calling or in URL..

---

You must ensure that you are not violating the same origin policy restriction. The best way to ensure this is to use relative urls:

var serviceurl = '/webservicename';

You must ensure that the domain hosting this javascript matches exactly the domain that you are sending your AJAX call to (including the protocol).