How to apply border radius in IE8 and below IE8 browsers?

Option 1

http://jquery.malsup.com/corner/

Option 2

http://code.google.com/p/curved-corner/downloads/detail?name=border-radius-demo.zip

Option 3

http://css3pie.com/

Option 4

http://www.netzgesta.de/corner/

Option 5

See this question

EDIT: Option 6

https://code.google.com/p/jquerycurvycorners/

Firstly for technical accuracy, border-radius is not a HTML5 feature, it's a CSS3 feature.

The best script I've found to render box shadows & rounded corners in older IE versions is IE-CSS3. It translates CSS3 syntax into VML (an IE-specific Vector language like SVG) and renders them on screen.

It works a lot better on IE7-8 than on IE6, but does support IE6 as well. I didn't think much to PIE when I used it and found that (like HTC) it wasn't really built to be functional.