function daftar_voucher() {
    var form = document.getElementById('validform');
    if (form.nama.value == ""){
     alert ("Kolom \"Nama \" Harus Diisi");
     form.nama.focus();
     return (false);
    }
    if (form.email.value == ""){
     alert ("Kolom \"Email\" Harus Diisi");
     form.email.focus();
     return (false);
    }

    ajax.setVar("id_history", form.id_history.value);
    ajax.setVar("email", form.email.value);
    ajax.setVar("nama", form.nama.value);
    ajax.setVar("start", form.start.value);
    ajax.setVar("count", form.count.value);
    var start = form.start.value;
    var count = form.count.value;

    ajax.setVar("submit15", "DAFTAR");
    ajax.requestFile = "insert_ol.php";

    ajax.method = "POST";
    ajax.element = 'id_data';
    ajax.onLoading = whenLoading;
    ajax.runAJAX("name=modules");

    link_http('kukm.php?portal=voucher&start='+start+'&count='+count,'id_data');
}