hello friends I have this table that my report generates in excel
$mos.="<table border-collapse: separate; >
<tr>
<th scope='col' bgcolor='#008000'>Solicitud Servicio</th>
<th scope='col' bgcolor='#008000'>Folio</th>
<th scope='col' bgcolor='#008000'>Mes</th>
<th scope='col' bgcolor='#008000'>Fecha</th>
<th scope='col' bgcolor='#008000'>Departamento</th>
<th scope='col' bgcolor='#008000'>Area</th>
<th scope='col' bgcolor='#008000'>Tipo Servicio</th>
<th scope='col' bgcolor='#008000'>Descripción del trabajo</th>
<th scope='col' bgcolor='#008000'>Observaciones</th>
<th scope='col' bgcolor='#008000'>Unidad</th>
<th scope='col' bgcolor='#008000'>Costo</th>
</tr><tr><td></td></tr>
";
but I get no border, I want to edge my board like I do?