executeFunctionByName.js

/**
 *  Executes a function by name.
 */
var executeFunctionByName = function executeFunctionByName(functionName, context /*, args */ ) {
	var args = Array.prototype.slice.call(arguments, 2);
	var namespaces = functionName.split(".");
	var func = namespaces.pop();
	for (var i = 0; i < namespaces.length; i++) {
		context = context[namespaces[i]];
	}
	return context[func].apply(context, args);
}