.ir                             { display: block; border: 0; text-indent: -999em; overflow: hidden; background-color: transparent; background-repeat: no-repeat; text-align: left; direction: ltr; *line-height: 0; }
.ir br                          { display: none; }
.hidden                         { display: none !important; visibility: hidden; }
.visuallyhidden                 { border: 0; clip: rect(0 0 0 0); height: 1px; margin: -1px; overflow: hidden; padding: 0; position: absolute; width: 1px; }
.visuallyhidden.focusable:active,
.visuallyhidden.focusable:focus { clip: auto; height: auto; margin: 0; overflow: visible; position: static; width: auto; }
.invisible                      { visibility: hidden; }