calling web services from javascript

Hi, this isnt directly related to Apache but I didnt exactly know where to post it, since I am a new member.

I have developed a webservice in java using NetBeans IDE and tested it using the IDE generated service tester. Now I need to call the web service from javascript. I am using the following code:

function testWebService(){
try {
netscape.security.PrivilegeManager.enablePrivilege("UniversalBrowserRead");
} catch (e) {
alert(e);
return false;
}

var params = new Array();
params[0] = new SOAPParameter("peter","username");
params[1] = new SOAPParameter("paul","password");

var soapCall = new SOAPCall();
soapCall.transportURI = 'http://localhost:8081/TestApplication/TestWSService';
soapCall.encode(0, "loginUser", 'http://test/', 0, null, params.length, params);
var response = new SOAPResponse();
response = soapCall.invoke();
alert(response.body.textContent);
}

This method is supposed to return true or false. However, it returns a NullPointerException. This exception is repeated for every Webmethod requiring some form of input parameter. However, when I call a test method "getTime" (which need no input), the response is correct.

Does anyone have any idea what could be the problem? You would save my life!! Thanks

 

I've coded a Java webservice using EJB3.0 and JSP frontend but i never heard of javascript that could call the webservice. (but then again my knowledge about javascript is limited)

Without seeing your webservice as a whole i can't spot where the error comes from. My advice is to system out every line you think the error might occour and see if you can fix it yourself.