Phonegap/Cordova plugin not loading

Phonegap/Cordova plugin not loading

I created a dummy project and a sample custom plugin that would only show
the activity indicator ( the one found on the top left part of the screen
).
I'm using cordova 3.0.0
js file: js/libs/plugins/networkactivity.js
iOS file(s): NetworkActivity.h || NetworkActivity.m
my js file:
cordova.define('cordova/plugin/js/networkactivity', function(){
var exec = require("cordova/exec");
var networkactivity = function() {};
networkactivity.prototype.ShowIndicator(isHidden){
exec(null, null, "NetworkActivity", "ShowIndicator", [isHidden]);
}
var networkactivity = new networkactivity();
module.exports = networkactivity;
});
in my config.xml
in my view:
if(!window.plugins) window.plugins = {};
else{
window.plugins.networkactivity =
cordova.require("cordova/plugin/js/networkactivity");
window.plugins.networkactivity.ShowIndicator(true);
}
But My plugin doesn't seem to load. Any help?