Can i update the page whitout reload it?

Rails
1

hello everybody
my name is reynaldo

and my question es the next:
i have a form whit a combobox and a textbox
the combobox have the number of days: 1,2,3,4,etc
and i want show in the texbox the result of the number of days for a
number
for example:
when de user choice 1 day, show in the box $200
when de user choice 2 day, show in the box $400
when de user choice 3 day, show in the box $600
when de user choice 4 day, show in the box $800

is it possible in RoR?

for your help thanks

2

one word:
javascript

one book:

  • kate = masukomi