post xml request to rest services using javascript

Question

Hi...

 

i am very new to javascript. how to call rest services using javascript. 

 

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function CreateXMLHttpRequest() {

                   if (typeof XMLHttpRequest != "undefined") {

                       //All modern browsers (IE7+, Firefox, Chrome, Safari, and Opera) uses XMLHttpRequest object

                       return new XMLHttpRequest();

                   }

                   else if (typeof ActiveXObject != "undefined") {

                       //Internet Explorer (IE5 and IE6) uses an ActiveX Object

                       return new ActiveXObject("Microsoft.XMLHTTP");

                   }

                   else {

                       throw new Error("XMLHttpRequestnot supported");

                   }

               }

               function CallService() {

 

                   var objXMLHttpRequest = CreateXMLHttpRequest();

 

                   objXMLHttpRequest.onreadystatechange = function () {

                       if (objXMLHttpRequest.readyState == 4)

                          objXMLHttpRequest.responseText;

 

                   }

                   objXMLHttpRequest.open("POST", "http://localhost:2546/abc.svc/json/GetXml", true);

                   objXMLHttpRequest.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");

                   //  objXMLHttpRequest.setRequestHeader("Content-Type", "text/xml; charset=utf-8");

                   var packet = '<?xml version="1.0"encoding="utf-8"?><CompanyRequest xmlns="http://schemas.datacontract.org/2004/07/abc.DomainModel" xmlns:i="http://www.w3.org/2001/XMLSchema-instance"><CompanyName>company1</CompanyName></CompanyRequest>';

 

                   objXMLHttpRequest.send(packet);

               }

 

i need to send xml request and response should also be xml. i am getting null response can anybody give me sample programs for this

 

thanks in advance...