.#{$prefix}mask { z-index: 100; position: absolute; width: 100%; height: 100%; zoom: 1; } // The mask is given position: fixed when called on the body. // See Element.mask() and EXTJSIV-10726. .#{$prefix}mask-fixed { position: fixed; } @if $include-ie { .#{$prefix}mask-shim { z-index: 100; position: absolute; top: 0; left: 0; width: 100%; height: 100%; } } .#{$prefix}mask-msg { z-index: 20001; position: absolute; }