Sometimes, the small functions in an Ajax based application are the ones that are most important. But even in a massive application, the small things should never be ignored. They might be considered as a leak where the point of attack will commence. Without securing the small things, your application might be destroyed without even knowing it. In this article, we take a look at three popular functions not only in JavaScript and Ajax but also in other programming languages: prompt, alert and confirm. These three functions will increase the interaction of the application. These functions are lightweight which requires little resources from the developer and the user.