CSS
Bild onmouseover
der Code in (x)html:
<p id="mouseover"><a href="index.html"></a></p>
der Code in css:
#mouseover a{
display:block;
height:33px;
width:45px;
background-image: url(../image/mail.png);
}
#mouseover a:hover{
background-image: url(../image/mail_hover.png);
}