[polyfills] sass & css3pie for border radius, box shaddow

gistfile1.sass

/*
info:
  http://sass-lang.com/
  group of css3pie mixins: http://css3pie.com/demos/tabs/
  define browser compliant shortcut for:
    - border-radius
    - box-shaddow
*/
/*
desc:   css3pie_box_shaddow apply a box-shaddow with css3pie 'framework'
usage:  @include css3pie_box_shaddow(10px, 10px, 1px, #efefef);
params:
        $h_len  [string]        the horizontal len of shaddow
        $v_len  [string]        the vertical len of shaddow
        $b_rad  [string]        the blur border radius
        $color  [string]        the color of the shaddow
*/
@mixin css3pie_box_shaddow($h_len, $v_len, $b_rad, $color) {
  -webkit-box-shadow: $h_len $v_len $b_rad $color;
  -moz-box-shadow: $h_len $v_len $b_rad $color;
  box-shadow: $h_len $v_len $b_rad $color;polyfills
  behavior: url(../../stylesheets/external/css3pie/PIE.htc);
}

/*
desc:   apply a border radius with css3pie 'framework'
usage:  @include css3pie_border_radius(10px);
params:
        $size   [string]        radius of 4 borders
*/
@mixin css3pie_border_radius($size) {
  -webkit-border-radius: $size;
  -moz-border-radius: $size;
  border-radius: $size;
  behavior: url(../../stylesheets/external/css3pie/PIE.htc);
}