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.

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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)