This is a list of best practices for creating websites that do not break when browsers are updated. It's not always possible to follow all of these, but following as many of them as possible will help future-proof your website. This is especially important for intranet applications and other non-public websites where problems are likely to not be noticed during testing by browser vendors.JavaScriptPrefix all global variable access in onfoo attributes with “window.”When an event handler content attribute (onclick, onmouseover, and so forth) is used on HTML element, al...