dimsemenov/Magnific-Popup — pull request #301 by dmitryvk (2013-12-01 09:56:43+00:00)
Title: Add filter:alpha(opacity) for better IE7 and IE8 compatibility

Older versions of IE (<= 8) do not support CSS property 'opacity' and require IE-specific 'filter' property to achieve similar effect. Currenly only .mfp-bg CSS rule uses 'filter' property. This patch adds 'filter' property to other CSS rules that use 'opacity' property.