.buscarusuario
{
            width: 25px;
            height: 25px;
            background-image: url('presentacion/imagenes/users25.png' );
            background-color: Transparent;
            border: none;
            background-position: center, center;
            background-repeat: no-repeat;
}
.buscarusuario1
{
            width: 29px;
            height: 29px;
            background-image: url('presentacion/imagenes/users29.png' );
            background-color: Transparent;
            border: none;
            background-position: center, center;
}
.botonaceptar
{
            width: 36px;
            height: 36px;
            background-image: url('presentacion/imagenes/aceptar.png' );
            background-color: Transparent;
            border: none;
            background-position: center , center;
}
.botonaceptar1
{
            width: 40px;
            height: 40px;
            background-image: url('presentacion/imagenes/aceptar40.png' );
            background-color: Transparent;
            border: none;
            background-position: center, center;
}