There's a really useful attribute in CSS called min-height that lets you set the minimum height an element should be displayed as; this is often used to make two boxes appear the same height even if one has less content than the other. Well, Firefox, Opera and Safari support it but Internet Explorer 6 and older don't. Luckily there's a really simple work-around for it, you simply add a defintion to your CSS that browsers other than IE will ignore and set the height to the same as the min-height, e.g.:
[source:css]

Here's a little tip for anyone using Paypal's Website Payments Standard system for electronic payments on their shopping cart. Their API allows you to pass in a complete shopping cart using a series of form fields listing the items, quantities, etc, as you'd expect. There's one tiny little detail that isn't explicitly stated - the button that you use to submit to the API must not have a name attribute otherwise it will fail. Here's a fully working example to better explain: