Create Entity in client side ( Java Script only)

Hi,
here is an example of create entity only in client side:

// Prepare values for the new contact.

var firstname = "Jesper";
var lastname = "Aaberg";
var donotbulkemail = "true";
var address1_stateorprovince = "MT";
var address1_postalcode = "99999";
var address1_line1 = "23 Market St.";
var address1_city = "Sammamish";
var authenticationHeader = GenerateAuthenticationHeader();

// Prepare the SOAP message.
var xml = "<?xml version'1.0' encoding='utf-8'?>" +
"<soap:Envelope xmlns:soap='http://schemas.xmlsoap.org/soap/envelope/'"+
" xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'"+
" xmlns:xsd='http://www.w3.org/2001/XMLSchema'>"+
authenticationHeader+
"<soap:Body>"+
"<Create xmlns='http://schemas.microsoft.com/crm/2007/WebServices'>"+
"<entity xsi:type='contact'>"+
"<address1_city>"+address1_city+"</address1_city>"+
"<address1_line1>"+address1_line1+"</address1_line1>"+
"<address1_postalcode>"+address1_postalcode+"</address1_postalcode>"+
"<address1_stateorprovince>"+address1_stateorprovince+"</address1_stateorprovince>"+
"<donotbulkemail>"+donotbulkemail+"</donotbulkemail>"+
"<firstname>"+firstname+"</firstname>"+
"<lastname>"+lastname+"</lastname>"+
"</entity>"+
"</Create>"+
"</soap:Body>"+
"</soap:Envelope>";
// Prepare the xmlHttpObject and send the request.
var xHReq = new ActiveXObject("Msxml2.XMLHTTP");
xHReq.Open("POST", "/mscrmservices/2007/CrmService.asmx", false);
xHReq.setRequestHeader("SOAPAction","http://schemas.microsoft.com/crm/2007/WebServices/Create");
xHReq.setRequestHeader("Content-Type", "text/xml; charset=utf-8");
xHReq.setRequestHeader("Content-Length", xml.length);
xHReq.send(xml);
// Capture the result
var resultXml = xHReq.responseXML;

// Check for errors.
var errorCount = resultXml.selectNodes('//error').length;
if (errorCount != 0)
{
var msg = resultXml.selectSingleNode('//description').nodeTypedValue;
alert(msg);
}
// Open new contact record if no errors.
else
{
var contactid = resultXml.selectSingleNode("//CreateResult");
window.open("/sfa/conts/edit.aspx?id={"+contactid.nodeTypedValue+"}");
}


Enjoy,
Rami Heleg