I'm sorry you're going to have to pick an argument and stick to it before I can possibly hope to respond. Either performance is so critical that a few kb to do

I'm sorry you're going to have to pick an argument and stick to it before I can possibly hope to respond. Either performance is so critical that a few kb to do feature detection is too much, or line performance has improved so much that 2MB of JavaScript for a text box and two buttons is "acceptable". You can't have it both ways.