[j-hernandez]

Aside from losing input when tabbing out, works a treat in Opera. Can think of a couple of places that a fork of this might come in handy in my work this week. Clever, thanks for sharing

[untothebreach]

it does a parseFloat() on the input, so input that can't be coerced into a float gets turned into NaN and not displayed.

[j-hernandez]

Makes sense, hadn't even looked that closely at the code before I commented - all 30 lines of it, ha. Shame on me.

[untothebreach]

Looks like that particular problem has been fixed.