Javascript command to open a PopUp Pro popup

I'm using Quform for a form I have and when someone successfully submits a form, they get a bootstrap message back. Within the bootstrap message field that Quform provides, I can run javascript. The script below works and just sends a standard javascript alert message box.

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<script type="text/javascript">
window.alert("Success");
</script>

I've used this javascript to open an X Them lightbox, and it works as well.

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<script type="text/javascript">
$('.link-lightbox').click();
</script>

What I'm looking for is a way to do this with PopUp Pro, where I can call a specific PopUp with Javascript.

I'm assuming I would have to give the popup a specific ID or Class name, but I'm not sure where I can add either an ID or Class name to a PopUp.

Thanks for the help!

--Craig