added math for iso calculation
moved button logic to top; not sure if correct
added results/error pane
css for results pane
added only-one-empty-field check, cleaned up some crap
formatting, removing old comments, etc.
variable formatting
<form> element
added calculator calls, proper output call
example flashpower changed to 1/2 from 1/4
using eval() to fix fp type coercion problem. parseFloat() won't work for some reason.
write calls inside control function, math kept separate
gn failing prevents other variable definitions
trying to find an agreeable style so result spacing is ok
trying to find decent results spacing reset
button bottom-margin
change max-width media query; remove footer cruft