.backtablaPOR{background-image: url(../img/back_cuad_rosa.gif); background-color: #FFdddd}
.backtablaAVI{background-image: url(../img/back_cuad_amar.gif); background-color: #FFf4e0}
.backtablaEMP{background-image: url(../img/back_cuad_cian.gif); background-color: #eeeeff}
.backtablaENT{background-image: url(../img/back_cuad_aqua.gif); background-color: #ddffee}