#button1{
	border: 0px solid black;
	width: 160px;
	height: 30px;
}
#button1 a{
	background-image:url(http://ondebiz.com/site/botoes/bt04w.png);
	background-repeat:no-repeat;
	background-position: 0px 0px;
	line-height: 30px;
	text-decoration: none;
	display: block;
	width: 100%;
	height: 100%;
}
html>body #button1 a{ /*Non IE rule*/
	width: auto;
}
#button1 a:hover{
	background-image:url(http://ondebiz.com/site/botoes/bt04w.png);
	background-repeat:no-repeat;
	background-position: 0px -30px;
	color:#CC0000;
}