How do I add a percentage to a form field???? help

You may want to provide some more information about how you've set up the form. Do you have a separate field that you want to place the 10% figure into?

George

Hi George,

Thanks for the reply, yes I have it set up like an invoice with a various total fields, then a subtotal field that adds together the total fields...
Then I have to add 10% (which is the GST field), thanks again

OK, I can show you the general approach, but realize when dealing with money, and taxes in particular, you have to round according to whatever rules you're compelled to adhere to. I'll conveniently ignore that part.

The following code is intended to be a custom calculation script for the GST field:

// Get the value of the subtotal field
// multiply it by the tax rate
// and set this field's value equal to the result
var tax_rate = 0.1;
event.value = getField("subtotal").value * tax_rate;


Your grand total field would then calculate the sum of the GST and the subtotal field.



George

Thanks so much, works like a charm...