Picturefill: A <picture> element polyfill variation

Variation of Scott Jehl's Picture Fill, which adds img and longdesc. Test results.

longdesc Test Results

Reveals and works correctly at all sizes (opens description page when activated) in:

• JAWS - with Internet Explorer (testing by Gez Lemon)
• iCab - natively via contextual menu
• Opera - natively via contextual menu
• Opera - via global icon with Chaals McCathieNevile's TellMeMore
• Firefox - via contextual menu with Patrick's longdesc
• Firefox - via link with Anthony's longdesk
• Safari - via alert and link with Jim Thatcher's favelet
• Chrome - via alert and link with Jim Thatcher's favelet
• Internet Explorer - via alert and link with Jim Thatcher's favelet (testing by Gez Lemon)