open js file in html button onclick

I am currently working in HTML and JavaScript. I am Beginner. I want to open a javascript file in the开发者_StackOverflow中文版 onclick event of the button which is in my html file. is there any method to do this. kindly help me.

thanks in advance.

It think you mean it "Load" instead of open

You can 'Load' JS file dynamically using following code

  var fileref = document.createElement('script')
  fileref.setAttribute("type","text/javascript")
  fileref.setAttribute("src", yourfilename)