.button1 a {
font: bold 12px Verdana, Arial, sans-serif;
text-decoration: none;
text-indent: 15px;
color: #FFFFFF; 
background: url(/files/shkola_hvaly/detaly/kategoriya_shkoly_knopki/kategoriya_shkoly_00a.jpg);
display: block;
width: 503px;
line-height: 40px;
height: 40px;
}

.button1 a:hover{
background-position: 0px -40px;
text-decoration: none;
color: #FFFFFF;
}

.button2 a {
font: bold 12px Verdana, Arial, sans-serif;
text-decoration: none;
text-indent: 15px;
color: #FFFFFF; 
background: url(/files/shkola_hvaly/detaly/kategoriya_shkoly_knopki/kategoriya_shkoly_00b.jpg);
display: block;
width: 503px;
line-height: 40px;
height: 40px;
}

.button2 a:hover{
background-position: 0px -40px;
text-decoration: none;
color: #FFFFFF;
}

.button3 a {
font: bold 12px Verdana, Arial, sans-serif;
text-decoration: none;
text-indent: 15px;
color: #FFFFFF; 
background: url(/files/shkola_hvaly/detaly/kategoriya_shkoly_knopki/kategoriya_shkoly_00c.jpg);
display: block;
width: 503px;
line-height: 40px;
height: 40px;
}

.button3 a:hover{
background-position: 0px -40px;
text-decoration: none;
color: #FFFFFF;
}