cross-browser-filter.css

.blur {
  /* modern stuff */
  -webkit-filter: blur(radius);
  -moz-filter: blur(radius);
  -o-filter: blur(radius);
  -ms-filter: blur(radius);
  filter: blur(radius);
  
  /* gecko */
  filter: url(blur.svg#blur);
  
  /* old IE */
  filter: "progid:DXImageTransform.Microsoft.Blur(PixelRadius=radius)";
  -ms-filter: "progid:DXImageTransform.Microsoft.Blur(PixelRadius=radius)";
}