hi.
I want do this and i cant!
problem 1 :
3 checkbox with 100,200,300 values.
and when i checked any of them. total shown in another input box.

prob 2:
a project like prev but by just one check box with 3 valeu: 100,200,300


notes: i find a example "Custom PayPal form example" that do this, but it use a Quantity field.
i dont need Quantity and i want to add checkbox values just and just!

thanks

Hello,

1.
This can be achieved by creating a function that calculates the total with the items from the checkbox group. A similar example can be found on our demo server:

demo.rsjoomla.com/calculation-form-example

In order to perform the calculation when the option is selected you need to use the following line in the "Additional attributes" of the checkbox fields:

onclick="total_function_name();"

2.
You will basically use the same method/function, but you will need to make some adjustments in order to calculate the total from a single checkbox instead of 3 different ones.

thanks for your answer. i saw calculate example of server. it was cool. but i can not understand how can i do my idea!
in radio group and textbox and lists the codes are useful but i dont know how can i use that for checkboxes.
my idea:
3 checkbox and a total input box.
default value of total is 0.

problem is here!
when i click on any check box default value in it add to total var and shown in editbox.

<script type="text/javascript">
function calculateRadio()
{
var op1=document.getElementsByName('form[checkbox1]');
var op2=document.getElementsByName('form[checkbox2]');
var result=document.getElementById('Total2');

result.value=0;

result.value=parseInt(result.value);

for(i=0;i<op1.length;i++)
if(op1.checked) result.value=parseInt(result.value)+parseInt(op1.value);

for(i=0;i<op2.length;i++)
if(op2.checked) result.value=parseInt(result.value)+parseInt(op2.value);
}

it doesnt work. i change the code according to the "paypal" rsjoomla template but it dont work again!


best guide was paypal example:

i make some change in it but it work just for 8 product and my 9th and more product doesnot work with this codes.
my main is when i click 1-8th check box it default value add to total. but 9th and more product value does not add to total.
some of my changes was:

var products = new Array("Product10","Product20","Product30","Product40","Product50","Product60","Product70","Product80","Product90","Product100");