How to read attribute value in soap response

[hugo@dlshk]

Dear All,
I am making a zimlet that can detect whether the user using which locale.
There is a field inside SOAP request GetInfoRequest, zimbraPrefLocale
The request can be called, but I don't know how to read the value inside the tag.
The response structure is:
<GetInfoResponse>
<version>{version}</version>
<id>{account-id}</id>
<attrs>
<attr name="{name}">{value}</a>
...
<attr name="{name}">{value}</a>
</attrs>
<prefs>
<pref name="{name}">{value}</pref>
...
<pref name="{name}">{value}</pref>
</prefs>

I want to get the value between <pref name="zimbraPrefLocale"> and </pref>

And the code inside the js is:

abc_HandlerObject.prototype.getAccountInfo =
function(result) {
	if (result.isException()) {
		var exception = result.getException();		
		alert(exception);
		return;
	}
	try{
		var response = result.getResponse().GetInfoResponse;
		var pre = response.prefs.pref;

		for (var i=0;i<pre.length;i++){
			if (pre[i].name=="zimbraPrefLocale"){
				alert(pre[i]);
				break;
			}
		}
	}catch(e){
		alert(e.message);
	}
};

And the result is "h is undefined"....
I have followed the coding in options tab in client

the code from the web works in my server, but my code do not work...

[hugo@dlshk]

finally, find the answer from http://files.zimbra.com/docs/zimlet/...ttings.js.html

var response = result.getResponse().GetInfoResponse;
var a = response.prefs._attrs["zimbraPrefLocale"];
alert(a);

var a = response.prefs._attrs.zimbraPrefLocale;

if the value is in id attribute and name attribute.
<GetInfoResponse>
<cos id="" name=""/>
</GetInfoResponse>

a = response.cos.id;

a = response.cos.name;

hope that can help the beginner of zimlet like me........