Slogan
h1.logo {
float: left;
display: inline;
width: x;
height: x;
}

h1.logo a {
background: url(ogo.png) no-repeat;
width: x;
height: x;
display: block;
text-indent: -9999px;
cursor: pointer;
}

h1.logo a:hover {
background: url(logohover.png) no-repeat;
width: x;
height: x;
display: block;
text-indent: -9999px;
cursor: pointer;
}