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Re:Digg's New DUI.Stream and MXHR by Glide on Wednesday April 22, 2009 @06:11PM (#574658)
I don't think they're replacing any objects.

Every time a Content-Type of image/gif is encountered it appends a new object to #stream with the image data inlined. I was really confused at the object tags at first, so I went ahead and copy pasted one of the object tags with image data into a blank html and loaded it into firefox. The image showed up fine.

This is an extremely clever solution. I know jQuery UI's icons are in one giant image file and background offsets are used to display the correct icon, but this is probably better for a dynamic solution because the amount of CPU it would take to stitch upwards of 100 images together.

Re:Digg's New DUI.Stream and MXHR by smhinsey on Wednesday April 22, 2009 @07:55PM (#574812)
that's called a sprite, that giant jquery ui file with multiple images, in case you want to find more info.