// Only run for ie
if (/msie/i.test(navigator.userAgent))
    addEvent(window, 'load', roundCorners);

function roundCorners() {
    var radius6 = {
        tl: { radius: 6 },
        tr: { radius: 6 },
        bl: { radius: 6 },
        br: { radius: 6 },
        antiAlias: true
    }
    curvyCorners(radius6, ".rounded6");
}