#obrazek1
{
background-image:url(../images/_servis/06_01_background.gif);

}
#obrazek2
{
background-image:url(../images/_servis/06_02_background.gif);

}
#obrazek3
{
background-image:url(../images/_servis/06_03_background.gif);
}
#obrazek4
{
background-image:url(../images/_servis/06_04_background.gif);
}
#obrazek5
{
background-image:url(../images/_servis/06_05_background.gif);
}
div.nav a, div.nav a:link, div.nav a:visited {
display:block;
}

div.nav img {
width:348px;
height:272px;
border:0;
}

div.nav a:hover img {
visibility:hidden;
}