Describe the bug

Browser gives console error message that attachEvent is not a function in line 29 of pngfix.js
window.attachEvent("onload", correctPNG);

Error message goes away when you change line 29 to:
window.addEventListener("onload", correctPNG, false);

Software Versions

• DNN: 09.08.00
• Module: 04.01.00
  Firefox 82.0.3

To Reproduce

Steps to reproduce the behavior:

1. Place Repository module on page
2. Press F12
3. Click Console tab
4. See error

Expected behavior

A clear and concise description of what you expected to happen.
No error should be thrown in browser