using Jquery Plugins-Border-Radius CSS

using Jquery Plugins-Border-Radius CSS

Am using Jquery plugins in my project , and one of its CSS class in ui.theme.css has Border-radius for getting the Rounded Corners . but currently its working in Firefox. How do i get it to work in IE as well. My manager is so strict on this. Please let me know if there is any latest version of plugins that has this issue Fixed.