Blur Mixin

Simple blur mixin, will work on Chrome 28+, Safari 6+, IE6-9, Firefox 10+

@mixin blur($px: 0) {
    -webkit-filter: blur(#{$px}px) !important;
    -ms-filter: blur(#{$px}px) !important;
    -moz-filter: blur(#{$px}px) !important;
    filter: url("data:image/svg+xml;utf8,<svg xmlns=\'http://www.w3.org/2000/svg\'><filter id=\'blur\'><feGaussianBlur stdDeviation=\'#{$px}\' /></filter></svg>#blur");
    filter:progid:DXImageTransform.Microsoft.Blur(PixelRadius='#{$px}');
}