$(function() {
    var a = "<?php echo $cbonom['tipopost'];?>";
        var b = document.getElementById("adjuntarCultura");
        var c = document.getElementById("adjuntarDeporte");
        if (a == "15") {
        b.style.display = "";
    }elseif (a == "16"){
        c.style.display = "";
    }
});