.levastrana {
		background-color:#333333;
    background-image:url(http://www.websnadno.cz/css/csspozadistroj.gif);
		background-position:right;
		background-repeat:repeat-y;
}
.pravastrana {
    background-color:#333333;
		background-image:url(http://www.websnadno.cz/css/csspozadistroj2.gif);
		background-position:left;
		background-repeat:repeat-y;
}