Method : 1
Note that this makes a GET request and if POST is required then you need to use the $.ajax() function directly, as shown below, instead of the $.getScript() shorthand.
Using $.ajax() instead:
The same thing can be done using the $.ajax function which allows for some more control over the parameters, such as making it a POST request instead or ensuring the file is never cached.
Method : 2
Load multiple script in best way: