body{background-color:yellow;}
a{padding-left:15px;width:150px;}
a:link{background-image:url(link.png) no-repeat left top;}
a:visited{background-image:url(visited.png) no-repeat left top;}
a:hover{background-image:url(hover.png) no-repeat left top;}
a:active{background-image:url(active.png) no-repeat left top;}