Some mixins for SASS

mixin.sass

$useIEFilters: 1

// might be 0 or 1. disabled by default.

=border-radius($values)
  -moz-border-radius: $values
  -webkit-border-radius: $values
  border-radius: $values

=border-bottom-left-radius($values)
  -moz-border-radius-bottomleft: $values
  -webkit-border-bottom-left-radius: $values
  border-bottom-left-radius: $values

=border-bottom-right-radius($values)
  -moz-border-radius-bottomright: $values
  -webkit-border-bottom-right-radius: $values
  border-bottom-right-radius: $values

=border-top-left-radius($values)
  -moz-border-radius-topleft: $values
  -webkit-border-top-left-radius: $values
  border-top-left-radius: $values

=border-top-right-radius($values)
  -moz-border-radius-topright: $values
  -webkit-border-top-right-radius: $values
  border-top-right-radius: $values

=box-shadow-no()
  -moz-box-shadow: none
  -o-box-shadow: none
  -webkit-box-shadow: none
  box-shadow: none

=box-shadow($x, $y, $offset, $hex, $ie: $useIEFilters)
  -moz-box-shadow: $x $y $offset $hex
  -o-box-shadow: $x $y $offset $hex
  -webkit-box-shadow: $x $y $offset $hex
  box-shadow: $x $y $offset $hex
  @if $ie == 1
    $iecolor: "#" + red($hex) + green($hex) + blue($hex)
    filter: progid:DXImageTransform.Microsoft.dropshadow(OffX=#{$x}, OffY=#{$y}, Color='#{$iecolor}')
    -ms-filter: quote(progid:DXImageTransform.Microsoft.dropshadow(OffX=#{$x}, OffY=#{$y}, Color='#{$iecolor}'))

=linear-gradient($from, $to, $ie: $useIEFilters)
  @if $ie != 1
    background-color: $to
  background-image: -moz-linear-gradient($from, $to)
  background-image: -webkit-gradient(linear,left top,left bottom,color-stop(0, $from),color-stop(1, $to))
  background-image: -webkit-linear-gradient($from, $to)
  background-image: -o-linear-gradient($from, $to)
  @if $ie == 1
    filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#{$from}', endColorstr='#{$to}')
    -ms-filter: quote(progid:DXImageTransform.Microsoft.gradient(startColorstr='#{$from}', endColorstr='#{$to}'))

=rgba($hex, $alpha, $ie: $useIEFilters)
  @if $ie == 1
    $hexopac: "#" + ceil($alpha * 255 / 16 * 10) + $hex
    background-color: none
    filter: progid:DXImageTransform.Microsoft.gradient(startColorStr='#{$hexopac}',EndColorStr='#{$hexopac}}')
    -ms-filter: quote(progid:DXImageTransform.Microsoft.gradient(startColorStr='#{$hexopac}',EndColorStr='#{$hexopac}'))
  @else
    background-color: $hex
    background-color: rgba(red($hex), green($hex), blue($hex), $alpha)

=rotate($deg, $ie: $useIEFilters)
  -moz-transform: rotate(#{$deg}deg)
  -o-transform: rotate(#{$deg}deg)
  -webkit-transform: rotate(#{$deg}deg)
  @if $ie == 1
    filter: progid:DXImageTransform.Microsoft.Matrix(sizingMethod='auto expand', M11=0.99144486137381, M12=--0.130526192220052, M21=0.130526192220052, M22=0.99144486137381)
    -ms-filter: quote(progid:DXImageTransform.Microsoft.Matrix(SizingMethod='auto expand', M11=0.99144486137381, M12=--0.130526192220052, M21=0.130526192220052, M22=0.99144486137381))
    zoom: 1

=transition($value)
  -moz-transition: $value
  -o-transition: $value
  -webkit-transition: $value
  transition: $value