Make this script clickable?

How can I make this script clickable so that when someone clicks on this script it opens up the Popup?—

<script type="text/javascript" src="http://billing.1whost.com/orderbutton/js?&options=1&width=600&theme_color=green&background_color=%23000000&background_opacity=50&bind_selector=.order-button&border_radius=0&product_id=2&loader=2">$11.94 for 6 Months</script>
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See original post by invalid@example.com (degreubiwa)