Send Enquiry popup on custom button

Hi,

I’d like to apply the actions/functions that happen when you click on the ‘Send Enquiry’ button to a custom button of my own that’s listed at the top of the details page.

I’ve tried implementing on my own but no luck.

The markup for the button I’m trying to apply it to is this:

///

<?php print "<a class=\"nectar-button large regular extra-color-2 has-icon  regular-button b_send_inquiry\" style=\"visibility: visible;\" rel=\"nofollow\" href=\"javascript:void(0);\" target=\"_blank\" data-color-override=\"false\" data-hover-color-override=\"false\" data-hover-text-color-override=\"#fff\"><span>Inquire Here</span><i class=\"fa fa-plus-square\"></i></a>"; ?>

///

when I apply the b_send_inquiry class to the a tag it shows the an empty popup.

Thank you in advance!!`