['filter', 
  ['property', 
    ['ident', 'filter']], 
  ['filterv', 
    ['progid', 
      ['raw', 'progid:DXImageTransform.Microsoft.AlphaImageLoader(src='images/transparent-border.png',sizingMethod='scale')'], 
      ['s', '
       ']], 
    ['progid', 
      ['raw', 'progid:DXImageTransform.Microsoft.AlphaImageLoader(src='test.png',sizingMethod='something')']]]]