JavaScript calculator help

[davidwhite]

Hello,

I am trying to make a JavaScript calculator form. I know there are some out there but they don't do exactly what I want to I am looking at doing my own.

It is slightly more complicated than a normal one.

Let's say I have items I want to sell. The customer can choose to customise an item and the calculator needs to work out the cost accordingly.

So for example:

• The items can be small, medium or large - each will have a base price
• They can be 1 colour or 2 colours, each has a separate price
• And the price per 100 depends on how many they buy. So for example if they buy 200 then it's £5.99 each. If they buy 500 then it's £5.50 each etc.

What is best to do here?

Should I be using arrays here or possibly storing in variables or using IF ELSE statements?

Thanks for any help.

[donatello]

Play with some ideas in JSFiddle... it makes it easier...

http://jsfiddle.net/QZSQX/


...Or perhaps there are already some libraries you can use with jQuery:
http://keith-wood.name/calculator.html

http://code.google.com/p/jquery-calculator/

Plugin to download: http://www.pengoworks.com/workshop/j...ion.plugin.htm