code: function roundedCorners(side, radius) {
    if (!radius) {
      radius = side || 10;
      side   = 'all';
    }
    if (side == 'all') {
      if (browserInfo().msie) {
        return {
          'border-radius': radius,
          behavior:        'url(border-radius-ie.htc)',
          visibility:      'hidden'
        }
      } else if (browserInfo().mozilla) {
        return {
          '-moz-border-radius': radius
        }
  
      } else {
        return {
          'border-radius':         radius,
          '-webkit-border-radius': radius
        }
      }
    } else {
      var rules = {};
      if (side == 'tl' || side == 'top' || side == 'left') {
        rules['-moz-border-radius-topleft']     = radius;
        rules['-webkit-border-top-left-radius'] = radius;
        rules['border-top-left-radius']         = radius;
      }
      if (side == 'tr' || side == 'top' || side == 'right') {
        rules['-webkit-border-top-right-radius'] = radius;
        rules['-moz-border-radius-topright']     = radius;
        rules['border-top-right-radius']         = radius;
      }
      if (side == 'bl' || side == 'bottom' || side == 'left') {
        rules['-webkit-border-bottom-left-radius'] = radius;
        rules['-moz-border-radius-bottomleft']     = radius;
        rules['border-bottom-left-radius']         = radius;
      }
      if (side == 'br' || side == 'bottom' || side == 'right') {
        rules['-webkit-border-bottom-right-radius'] = radius;
        rules['-moz-border-radius-bottomright']     = radius;
        rules['border-bottom-right-radius']         = radius;
      }
      return rules;
    }
  }
docs: Override of Csster's built-in method to support rounded corners on IE.
  See docs there for description.