hi I am trying to add a button on sales record that will generate a PDF ok here is the link https://netsuite.custhelp.com/app/answers/detail/a_id/93513/kw/record.id and I don't know where I am going wrong maybe it's not taking the pageIniT functions I am also attaching script for reference

Try removing the "()" on the button function. Also ensure the right ID for the client script. If you click the button and view the browser console, do you get an error?

i checked console, it worked