.mbButton
img{ 
filter:progid:DXImageTransform.Microsoft.Alpha(opacity=60);
-moz-opacity: 0.6;
margin: 0px;
border:0px;
 
}

.mbButton:hover 
img{
filter:progid:DXImageTransform.Microsoft.Alpha(opacity=100);
-moz-opacity: 1;
margin: 0px;
border:0px;
}

.mbButton:active, .mbButtonSelected
img{ 
filter:progid:DXImageTransform.Microsoft.Alpha(opacity=100);
-moz-opacity: 1;
margin: 0px;
border:0px;
}

.mbButtonSelected:hover
img{ 
filter:progid:DXImageTransform.Microsoft.Alpha(opacity=80);
-moz-opacity: 0.8;
margin: 0px;
border:0px;
}