Having An HTML Checkbox Call A JavaScript Function

Posted on 2013-06-25
Medium Priority
Last Modified: 2013-11-19
ClickBank requires for recur bill products to have a checkbox that the value is sent to the ClickBank payment processing that indicates whether the customer accepted (checked) or declined (not checked) the billing agreement.  ClickBank gives the following code as an example:

<script type="text/javascript">
function toggleAccept() {
var acceptLink = document.getElementById("accept");
var agreeCheckbox = document.getElementById("agreeCheckbox");
if (agreeCheckbox.checked) {
acceptLink.onclick=function() {
window.location=this.href + "&cbrblaccpt=true";
return false;
} else {
acceptLink.onclick=function() {
return false;
function mustAccept() {
window.alert("By clicking accept, you agree to the payment terms of this recurring product.");



My HTML/JavaScript is a bit rusty.  How would I set up the checkbox in HTML to call the above code?

Question by:James Cochrane
LVL 19

Accepted Solution

zc2 earned 2000 total points
ID: 39275816
So, you need the "Accept" link and the "Agree" checkbox, something like these:

<input type="checkbox" id="agreeCheckbox" onclick="toggleAccept()">
<label for="agreeCheckbox">Check if you accept the billing agreement then click the link below.</label>
<a  id="accept" value="Accept" onclick="mustAccept()"

Open in new window

By default, the link has the "mustAccept()" onclick handler (which shows the alert message).
The checkbox has the toggleAccept() onclick event handler, calling the function from the sample.
When the user clicks the checkbox the code toggles the link's onclick handler to the function which appends the extra parameter to the link's URL. So, after that the user has to click on the link and the combined URL will be navigated to.

Author Closing Comment

by:James Cochrane
ID: 39275845
Very timely and did exactly what I needed.

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