Two short questions:
1. I want to center text vertically in the HTMLElement text box. I played around with the 'Inline Style' property, but did not find a satisfying solution so far. Vertical alignment seems to be particularly difficult. Any ideas?
2. Square roots in LaTex appear beautifully in Fengist's example (using the online MathJax inclusion), but not in el3um4s (using the offline MathJax inclusion). I don't understand why. I might understand the code once I get more used to JS, but I thought I might ask anyway.