diff -r 000000000000 -r 1afc9d2ab94d authserver/testCAS/resources/assets/less/bootstrap/mixins/opacity.less
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/authserver/testCAS/resources/assets/less/bootstrap/mixins/opacity.less	Wed Apr 01 15:31:12 2015 +0200
@@ -0,0 +1,8 @@
+// Opacity
+
+.opacity(@opacity) {
+  opacity: @opacity;
+  // IE8 filter
+  @opacity-ie: (@opacity * 100);
+  filter: ~"alpha(opacity=@{opacity-ie})";
+}