Setting a fields value to '0' if checked otherwise adding its content 1

[Olorin1]

This is what i mean: (two problems)

First - I have a spreadsheet type form which ultimately adds the GST (tax canadian style)to the total. But i need to add a checkbox which if clicked will render the tax field as '0' - hence not adding tax. What can you recommend for the function where the tax is otherwise being calculated all the time.

Something like (which obviously isn't working)

if {
form.checkbox.value = "checked"
form.taxfield.value = "0"
}

Second - it is necessary for every form field to round to two decimal places, as in a monitary amount. Being sure not to round up to the next dollar amount! And i would like to try to put these two solutions together.

Thanks so much,

DES

 

[GIGN]

You just need to add the condition in your function which displays the price and the tax - you basically have already got the algorithm.

You need to use domething like:

if(form.checkboxname.checked){

form.taxfield.value="0";
}

As part of the function. I presume you are calling this function to update the values, when any control is changed on the form?
If box is checked the 'checked' property returns true.
b² - benbiddington@surf4nix.com