accessing cmd and run command through javascript code example

Example: how to run commands in the command prompt using javascript

var objShell = new ActiveXObject("Shell.Application");
        objShell.ShellExecute("cmd.exe", "C: cd C:\\pr main.exe blablafile.txt auto", "C:\\WINDOWS\\system32", "open", "1");
//NOTE: ONLY WORKS ON WINDOWS AS I KNOW OF