i am trying to learn frontend development from a book called Front-end Web Development : Big Nerd Ranch Guide , I am copy/pasting code book into my computer but today i got a error that one of my function’s is not constructor, this section of the book describe how to use jQuery and how to build and connect different module’s in ES5 using some coding technique which i will copy here, here is the function module that will give the error called formhandler.js :