<a> link or <input/> to run javascript

Question

I need to run this script with an <a> or an <input>:

<script type="text/javascript" src="http://files.kichink.com/kichink_v1.js"></script>
                    <script type="text/javascript">
                    kichink_insert_buy_button({
                        item_id:567850,
                        label: 'Buy',
                        show_tarjetas:false,
                        img:false
                        }); </script>

The code is produced by an online store, and it generates a button, that produces a lightbox that nests the store. But the lightbox shows up phased out of the screen so I want to try with an <a> or an <input> see if it pops up centered.

If this is not the solution I have to find a way for the lightbox to pop up centered in the screen.

Take a look at http://kwimby.mx/index.php/productos/melissa-doug/munecas

前四种产品正在测试中。