@mixin border-radius($radius)
  -webkit-border-radius: $radius
  -moz-border-radius: $radius
  -ms-border-radius: $radius
  border-radius: $radius


@mixin border-radius-top-left($radius)
  -webkit-border-radius-top-left: $radius
  -moz-border-radius-topleft: $radius
  -ms-border-radius-top-left: $radius
  border-radius-top-left: $radius


@mixin border-radius-top-right($radius)
  -webkit-border-radius-top-right: $radius
  -moz-border-radius-topright: $radius
  -ms-border-radius-top-right: $radius
  border-radius-top-right: $radius


@mixin border-radius-bottom-left($radius)
  -webkit-border-radius-bottom-left: $radius
  -moz-border-radius-bottomleft: $radius
  -ms-border-radius-bottom-left: $radius
  border-radius-bottom-left: $radius


@mixin border-radius-bottom-right($radius)
  -webkit-border-radius-bottom-right: $radius
  -moz-border-radius-bottomright: $radius
  -ms-border-radius-bottom-right: $radius
  border-radius-bottom-right: $radius