.hidden {visibility: hidden;}
.none {display: none;}
img {border: none;}
* {background-repeat: no-repeat;}

.odrazka, .cb {clear: both;}

.small {font-size: small;}

.tucne, .chyba, .ok {font-weight: bold;}
.kurziva {font-style: italic;}

.red, .chyba {color: red;}
.green, .ok {color: green;}

.pozn {font-style: oblique; font-size: 90%;}

.text-top {vertical-align: top;}

.clr {clear: both; height: 0; overflow: hidden; font-size: 1px; border: 0; padding: 0; margin: 0; line-height: 0;}

.tac {text-align: center;}