a.ovalbutton{
background: transparent url('/revista/images/interfase/bot_off.png') no-repeat top left;
float: left;
width:179px;
margin-left:0px;
text-align:center;
font: normal 11px Arial; /* Change 13px as desired */
line-height: 30px; /* This value + 4px + 4px (top and bottom padding of SPAN) must equal height of button background (default is 24px) */
height: 33px; /* Height of button background height */
padding-top:3px;
padding-left: 35px; /* Width of left menu image */
text-align:left;
text-decoration: none;
}

a:link.ovalbutton, a:visited.ovalbutton, a:active.ovalbutton{
color: #494949; /*button text color*/
}

a.ovalbutton span{
padding: 24px 11px 4px 0; /*Set 11px below to match value of 'padding-left' value above*/
}

a.ovalbutton:hover{ /* Hover state CSS */
background: transparent url('/revista/images/interfase/bot_on.png') no-repeat top left;
background-position: bottom left;
}

a.ovalbutton:hover span{ /* Hover state CSS */
background-position: bottom right;
}

.buttonwrapper{ /* Container you can use to surround a CSS button to clear float */
overflow: hidden; /*See: http://www.quirksmode.org/css/clearing.html */
padding-left: 0px; /* Width of left menu image */
width: 100%;
padding-top:0px;
}