Here's my Random Quote Machine. I would appreciate some suggestions?

I was rushing to finish it. I expect you’ll find lots of bugs. I’ll be happy with any comments/suggestions.
I wouldn’t say it’s 100% finished :wink:
Here’s my Random Quote Machine

I realized I can’t use encodeURIComponent() to change all special characters to the acceptable ones by Tweeter. What else can I do? What encoding should I use preparing the text for Tweeter?
Sometimes the quotes are displayed in the tweeter window OK, but sometimes not.