JavaScript is one of the most popular scripting programming languages created by Netscape in the nineties. JavaScript is most often used on websites, ensuring interaction, by responding to events, as well as creating complex visual effects and validating data entered in forms. Importantly, these scripts, running on websites, have limited access to the user’s computer. On this script it is also possible to write applications that use system resources with a graphical user interface adapting to a given platform. Microsoft provides libraries that allow developers to create applications as part of the Windows Scripting Host environment.