gistfile1.sass

@mixin gradient($start, $end, $type: "vertical") {
  @if "vertical" == $type {
    background: -webkit-gradient(linear, left top, left bottom, from($start), to($end));
    background: -moz-linear-gradient(top, $start, $end);
    filter: progid:DXImageTransform.Microsoft.gradient(StartColorStr='#{$start}', EndColorStr='#{$end}');
  } @else if "horizontal" == $type {
    background: -webkit-gradient(linear, left top, right top, from($start), to($end));
    background: -moz-linear-gradient(left, $start, $end);
    filter: progid:DXImageTransform.Microsoft.gradient(StartColorStr='#{$start}', EndColorStr='#{$end}', GradientType=1);
  } @else {
    @warn "#{$type} is not a valid gradient type";
  }
}