New page loading before "Ok" clicked.

[perthsystem]

Hi, Great script!

Took me a while to figure out NOT to put messi.js at the bottom of html script (before ) as it says in instructions.
Problem is this, I have a message popup before the user is taken to another page, I would expect the new page to load after the "Ok" button is clicked on the messi message box, but it's not happening that way, the new page loads right after the message is displayed.
Is this a bug, or am I doing something wrong?
This my code:

<script> new Messi("", {title: 'Notice!', modal: true, modalOpacity: .5, width: '300px', titleClass: 'anim warning', buttons: [{id: 0, label: 'Continue', val: 'X'}]}); </script>

Any help would be appreciated,
Thank you.