i know there are a number of plugins that can do this, i have tried a few. in the past the ones i have tried always lead to some flickering on Firefox.
The one in the link below seems to work seamlessly, but i cant seem to figure out what they are using.
if anyone can take a look, i’d appreciate it!
link: http://usa.buy2.co.il/assets/themes/Buy2Usa/pages/error.html
thanks!
You accomplish this with CSS.
Go here to learn more