Why Does This Bookmarklet Js Code Not Work When Put In An Onclick Handler?

I have a pretty typical bookmarklet code that's working perfectly for me in all browsers. However, when I take this code and put it in an HTML's element onClick handler, it doesn't

Solution 1:

Solved by adding window.AppD in front of the variable declaration.

Solution provided by Andrew Noyes in another question:

Are there any limitations to what can be done in an inline onclick handler?