title: Javascript library to split and merge PDF?
body: <p>Is there a good javascript library to manipulate PDF files "visually" ?</p>
  
  <p>I'm looking for something that allow me to view a PDF page by page into one container, and drag and drop page by page to a new empty container to make the new PDF and then I could save all modification in my docbase. 
  I did some searches and didn't find something that do that, except some heavy clients, but I want to integrate this functionnality into my webapp... </p>
  
  <p>Also thought about some custom dev, but can't really estimate the time it would take... </p>
  
  <p>Any suggestion ?</p>