[SOLVED] Possible with javascript?

[Shamrox]

I have a dropdown list on a form that lists different types of credit cards. I also have a form field that is called charge card fee and I would like this to be populated with a $ amount based on what card was selected from the dropdown. Each card has a different fee that is a % of the sale price. So there is a third field of Price that is involved.

Is there a way to have the fee field calculated and populated using javascript?

 

Any help is appreciated. Thanks.

[fenway]

Sure, onchange of the dropdown, call a JS function that checks a hash of CC options and contains the % fee; then pull the price, and update the fee field appropriately

[Shamrox]

Could you provide a bit of code example as I have no clue how to write js.

[emehrkay]

function checkCC(){

var type  = document.getElementById(this);

var perct = 0;

switch(type){

case 'visa':

perct = .25;

break;

case 'mastercard':

perct = . 28;

break;

}

document.getElementById('id of field that holds the percent value, this could be a hidden field, just give it an id').value = perct;

}

 

<select onchange = "checkCC(this)"></select>

[Shamrox]

Thanks emehrkay, that was a ton of help!