ul#menu {  
	list-style:none;
	margin:0;
	padding:0;
	}
ul#menu li {
	padding:0;
	float:left;
	}
ul#menu li a {
	display:block;
	width: 120px;
	height:20px;
	background-image:url(../images/menutr.png);
	
	text-decoration:none;
	}
ul#menu li a#inicio:hover {
	background-position:0px bottom;
	}
ul#menu li a#bloquete:hover {
	background-position:-120px bottom;
	}
ul#menu li a#aceitera:hover {
	background-position:-240px bottom;
	}
ul#menu li a#contacto:hover {
	background-position:-360px bottom;
	}

ul#menu li a span {
	display:none; 
	}
#inicio {
	background-position:0px top;
	}
#bloquete {
	background-position:-120px top;
	}
#aceitera {
	background-position:-240px top;
	}
#contacto {
	background-position:-360px top;
	}