Easiest way to add a popup?

[trilly]

I know people don't like popups, but I like how the Estimated Shipping Costs addon works by displaying the costs in a popup.

 

So, to make it as assessible as possible for the customer, I've displayed a link in my Shopping Cart infobox labeled "Estimate Shipping". The idea is that on whatever page the customer is on in my store, they can click that link and get a shipping estimate.

 

The problem is, I only know how to make this work by going into every single page of my store and adding the popup javascript code between the <link> and the </head> tags.

 

Is there an easier way? Can I add this to the Shopping Cart infobox code, or somewhere else, like the header include? I'm a bit of a noob on javascripting.

 

Thanks in advance

[trilly]

Well, to answer my own question, I gave it a try. I inserted the javascript popup code at the beginning of the catalog\includes\boxes\shopping_cart.php file.

 

Since there is no <link> and </head> tags there, it's floating there within the body of every page where the shopping cart info box code is listed.

 

It works. Anyone know if this is a problem?