function call2WS() {
    var soapEnv = "<?xml version='1.0' encoding='utf-8'?>
        <soap:Envelope xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xsd='http://www.w3.org/2001/XMLSchema' xmlns:soap='http://schemas.xmlsoap.org/soap/envelope/'>
        <soap:Body>
            <GetUserProfileByName xmlns='http://microsoft.com/webservices/SharePointPortalServer/UserProfileService'>
                <AccountName>domain\username</AccountName>
            </GetUserProfileByName>
        </soap:Body>
        </soap:Envelope>";

    var call = $.ajax({
        url: "http://sharepoint/_vti_bin/UserProfileService.asmx/GetUserProfileByName",
        type: "POST",
        dataType: "xml",
        username: "domain\username",
        password: "passwd",
        data: soapEnv,
        headers: {
            contentType: "text/xml; charset="utf-8""
        }
    });