Changed design, = and C buttons now are twice as big as a normal button. Parentheses can now be used.
reworked cookie stuff. implemented getValue() function to easily change form names and stuff...

reset-button does not reset all fields but only the display
Reverted back to one form.
Reset button does not use 'built-in' form-reset function (-> type = 'reset') but a custom handler
Fixed mistakes with '(' and ')' (used special function isntead of add)