a.button {
display: block;
background-color: transparent;
background-image: url(button_blue.png);
background-repeat: no-repeat;
width: 200px;
height: 70px;
margin: 5px auto;
padding: 25px 0 0 0;
text-align: center;
font-family: sans-serif;
font-size: 200%;
color: #202323;
font-weight: bold;
text-decoration: none;
}
a.button:hover { background-image: url(button_yellow.png); }

div.preloader { background: url(button_yellow.png); visibility: hidden; }