Lazy Load External Javascript Files

var scriptResource = new ScriptResource('location/of/my/script.js');
scriptResource.call('methodName', arg1, arg2);

var scriptResource = new ScriptResource('location/of/my/script.js');
scriptResource.methodName(arg1, arg2);

ScriptResource = function(scriptLocation)
{
    this.onMethodCall = function(methodName)
    {
        this.call(arguments);
    }
}

obj.__noSuchMethod__ = funtion( id, args ) {
    this[id].apply( this, args );
}

var methods = ["foo", "bar", "baz"];
for (var i=0; i<methods.length; i++) {
    var method_name = methods[i];
    WildCardMethodHandler[method_name] = function () {
        this.handleAllMethods(method_name);
    };
}

var extObj = ScriptResource('location/of/my/script.js');
extObj('methodname')(arg1,arg2);

function ScriptResource(file) {
  return function(method) {
    loadExternalScript(file);
    return window[method];
  }
}