Generate a PDF from a webpage using javascript

I need to have a button in a website which converts the entire page into a PDF. The page is an online learning activity with drag and drop resource. It also have some textarea objects, that must be converted too, but including the input inserted by the user. I tried to achieve this using jsPDF, but was unsuccessfull - but maybe I just have not explored all the potential of the script. The page that must be converted is this: [login to view URL] Please contact me if you know how to do this.