jQuery Forum

do you know http://knockoutjs.com/ ? give it a try, it's great for client side data-bindings and calculations .

Check this out.

here is an example that jquery mobile and knockout work together: http://jsfiddle.net/olli/XpK63/ . it is the jquery mobile version of the second tutorial that can be found on  http://learn.knockoutjs.com

@chris , thank you for the link.
But it isnt how i must do a "simple" calculation.
It is how i should implement the calculation.

@olli, i see it grabs a "fixed" price,but that isnt the same as my question,if you looked closely to my fiddle you could have seen i got that default calculation already.

The whole point is , i have a fixed price and depending on the options ,what could have any price either + or -.

if i have let's say a product called:

graphic-card 32MB  price $200
as my default product.

With options:

Memory:
16MB (- $20)
64MB (+$100)

Model:
standard (+ $0)
Deluxe (+100)

Wouldnt that make the calculation aloth more complex, knockoutjs doesnt do that.

i use 3 vars
var selectedOptionPrefix  (can be + or -)
var selectedOptionPrice (can be any number/price)
var productsPrice (can be any number/price)


below code doesnt work,it is for information
var calculatedPrice = (productsPrice selectedOptionPrefix  selectedOptionPrice );

I got it almost figured out, just missing a little thing:

I use a function to use variables as operators:

1.     var operators = {
2.     '+': function(a, b) { return a + b },
3.     '-': function(a, b) { return a - b },
4.     
5. };