HTML and CSS Reference
To get border-image to work in current browsers, you need to first spec-
ify the vendor-specific properties for Firefox and Safari/Chrome. Next,
give the September 2008 version of the property for Opera, and finally
the current version of the property with the fill keyword. This will
ensure that future browsers that fully implement the property will
render identically to current browsers, which treat fill as being the
default and ignore the fill keyword.
Unfortunately, if you don't want the behavior from the 2008 spec
that treats fill as the default, there's no way to override it in
CSS in older browsers. The easiest way to achieve this is to use
an image that's blank or transparent in the central area.
Supporting old versions of Internet Explorer
Internet Explorer was the first browser to implement a method for
specifying drop shadows in CSS , way back in the version 5.5 release.
Microsoft implemented a method of calling an ActiveX control and
applying it to an element that can be used either from CSS or Java-
Script. ActiveX has a pretty bad reputation in web developer circles
that may partly explain why these techniques weren't seriously
explored until recently. There are two filters for shadows in IE8 : Drop-
Shadow and Shadow .