AdWords tracking conversion click on button - redirect not working in Chrome
I have an issue with the snippet code for tracking conversion clicks on 4 buttons in a couple of landing pages of a donation portal.
This issue is related only to Chrome browser (it's working fine on Safari and Firefox).
The snippet is attached to a button inside a pop-up which redirects the user to a PayPal donation page. When clicking on the button, instead of redirecting the user to PayPal, the browser simply reloads the landing page.
I tried to move the button outside the pop-up to check if that was the issue but the problem still exists.
I don't think there's anything wrong with the script or the onclick attribute since it's working fine with other browsers.
Here's the URL to one of these landing pages: http://donations.environomica.org/memorialtrees.html
The 4 buttons for donations have the same onclick attributes and are related to the snippet provided for the specific AdWords tracking feature.
Does anybody know if that's a common issue and how to fix this?
Thanks in advance,