.tngbh-btn {
font-family: Tahoma;
font-size: 18px;
color: #FFFFFF;
border-style: solid;
border-width: 1px;
border-color: #339900;
border-radius: 5px;
-moz-border-radius: 5;
-webkit-border-radius: 5;
padding: 11px 22px 11px 22px;
background: #31963A;
}

.tngbh-btn:hover {
font-family: Tahoma;
font-size: 18px;
color: #FFFFFF;
border-style: solid;
border-width: 1px;
border-color: #339900;
border-radius: 5px;
-moz-border-radius: 5;
-webkit-border-radius: 5;
padding: 11px 22px 11px 22px;
background: undefined;
}