Contoh

$('#customFields').on('keydown', '.big', function(e) {
    var tableData = $('#customFields tr').length;
    var totalTable = parseInt(tableData)-1;
    if(totalTable > totalData){
        alert('Maaf, data asset sudah maksimal untuk package ini');
    }else{
        var keyCode = e.keyCode || e.which;
        if (keyCode == 9) {
            var $this = $(this),
            idx=$('.big','#customFields').index($this),
            $regex,
            $parent=$this.parents('tr').children('td'),
            id = $this.val();
            $regex=new RegExp(/[0-9]+/);
            if(!id.match($regex)){
                alert("Maaf data harus berupa angka");
                $this.focus();
                return;
            }
            $.ajax({
                type: 'POST',
                url: '<?php echo $this->createAbsoluteUrl("package/getdata"); ?>',
                data: {
                    data: id,
                },
                dataType: 'json',
                cache: false,
                success: function(result) {
                    if(result==""){
                        alert("Maaf, data tidak ditemukan untuk kode : "+id);
                        $this.focus();
                    }else{
                        var allFields=[],
                        hasEmpty=false,
                        $emptySel;

                        $('#customFields .big').each(function(index, item) {
                            var $itm=$(item);
                            var reqField = $itm.val();
                            allFields.push(reqField);
                            if(reqField==''){
                                hasEmpty=true;
                                $emptySel=$itm;
                            }
                        });

                        var sortedFields=allFields.sort();
                        var results=[];
                        for (var i = 0; i < allFields.length - 1; i++) {
                            if (sortedFields[i + 1] == sortedFields[i]) {
                                results.push(sortedFields[i]);
                            }
                        }
                        if(results.length>0){
                            alert('Maaf, data sudah ada di list.');
                            $this.val('');
                            $this.focus();
                            return;
                        }

                        if(hasEmpty){
                            $emptySel.focus();
                            return;
                        }

                        $parent.eq(1).children().val(result[0].asset_name);
                        $parent.eq(2).children().val(result[0].viewcardno);
                        $parent.eq(3).children().val(result[0].region_name);
                        $parent.eq(4).children().val(result[0].asset_status);
                        $parent.eq(5).children().val(result[0].partner_name);
                        $parent.eq(6).children().val(result[0].asset_id);
                        count += 1;
                        var $row = $(
                        '<tr valign="top">'
                            + '<td>'+'</td>'
                                + '<td><input type="text" class="small" id="data2_'+count+'" name="data2_'+count+'" value="" readonly="readonly"/></td>'
                                + '&nbsp;'
                                + '<td><input type="text" class="small" id="data3_'+count+'" name="data3_'+count+'" value="" readonly="readonly"/></td>'
                                + '&nbsp;'
                                + '<td><input type="text" class="small" id="data4_'+count+'" name="data4_'+count+'" value="" readonly="readonly"/></td>'
                                + '&nbsp;'
                                + '<td><input type="text" class="small" id="data5_'+count+'" name="data5_'+count+'" value="" readonly="readonly"/></td>'
                                + '&nbsp;'
                                + '<td><input type="text" class="small" id="data6_'+count+'" name="data6_'+count+'" value="" readonly="readonly"/></td>'
                                + '&nbsp;'
                                + '<td><input type="hidden" class="small" id="data7_'+count+'" name="data7_'+count+'" value="" readonly="readonly"/></td>'
                                + '&nbsp;'
                                + '<td><input id="rows_' + count + '" name="rows[]" value="'+ count +'" type="hidden">'
                                + '<a href="javascript:void(0);" class="remCF">Remove</a>'
                        + '</tr>').appendTo("#customFields");

                        var copyData = $this.clone();
                        copyData.val('');
                        var repID = copyData.attr('id', 'data1_'+count+'');
                        var repName = copyData.attr('name', 'data1_'+count+'');

                        $row.find('td:first').append(repID);
                        repID.focus();
                    }
                },
                error: function(jqXHR, exception){
                    alert('Failed DB connection. Please reload page');
                }
            });
        }
    }
});