Javascript 未捕获范围错误：超过最大调用堆栈大小

所以我有一个问题，它说：“jquery.min.js:4 Uncaught RangeError:超过了最大调用堆栈大小”，我不知道如何修复它，我正在修复别人的代码，这是我的php代码 我的js

函数displayCom（）
{
var com=document.getElementById（“sel_cloud”）.value；
if（com<0）{
//抛出异常（“请选择一个接口”）
}
否则{
$.ajax({
类型：“POST”，
url:“../administration/func\u manager/ajax\u subscribers.php”，
数据：{selfinterface:com}，
成功：功能（数据）{
警报（数据）；
$（“#sel_communicator”）.html（数据）；
}
});
}
}

下面是我的ajax和我的select，其中使用了dislayCom（）函数：

<?php
ini_set('display_startup_errors', 1);
ini_set('display_errors', 1);
error_reporting(-1);

$current_interface = 'CPANEL';
require_once '../../cao/sys/config.class.php';

if(isset($_POST['selInterface'])){
    $interfaceID = pg_escape_string($_POST['selInterface']) ;

    if($_POST['selInterface'] =='120'){
        $curr_cao = new CGenDb("reddi", '12.121.21.21', 2);
        $curr_cao_tac = new CGenDb("reddi_tac", "12.121.21.21", 2);
    }elseif($_POST['selInterface'] =='121'){
        $curr_cao = new CGenDb("reddi", '212.121.21.21', 12);
        $curr_cao_tac = new CGenDb("database", "212.121.21.21", 12);
    }else{
        echo "no Interface found";
    }

            $query = new CGenRs("SELECT * FROM tac_account ",$curr_cao_tac);
            $query->first();



?>
<div class="row well well-lg">
    <div class="-md-2" >
        <span> communicator </span>
    </div>
    <div class="col-md-4"> 
        <select>
            <?php 
            if($query->rowcount()){
                while (!$query->eof() ){
                    ?>
            <option value="<?php echo $query->valueof('acc_id'); ?>"><?php echo $query->valueof('acc_name')  ?>  </option>        
            <?php
            $query->next();
                }
            }
            ?>
        </select>
    </div>
</div>

<?php
}
 <span>Select Interface (required)</span>
                </div>
                <div class="col-md-4" >
                    <select name="sel_cloud" id="sel_cloud" onchange="displayCom()" class="form-control">
                        <option value="-1">Select Interface</option>
                        <?php
                        $sel_interface_options = new CGenRS("select type_desc, type_id from lu_type where type_status = 't' and type_group = 'cloud' and type_sub_group = 'db'", $cao);
                        $sel_interface_options->first();

                        if ($sel_interface_options->rowcount()) {
                            while (!$sel_interface_options->eof()) {
                                ?>
                                <option  value="<?php echo $sel_interface_options->valueof('type_id'); ?>" ><?php echo $sel_interface_options->valueof('type_desc'); ?></option>
                                <?php
                                $sel_interface_options->next();
                            }
                        }
                        ?>
                    </select>
                </div>
                <br/>

通信器
您在哪里调用
displayCom（）
？也许你有一个无限循环。对不起，我怎么会忘记这里我怎么添加它编辑你的帖子。链接位于标签后面的底部。我按照您说的那样添加了它。您在哪里调用
displayCom（）
？也许你有一个无限循环。对不起，我怎么会忘记这里我怎么添加它编辑你的帖子。链接位于标签后面的底部。我按照你说的添加了它
<?php
ini_set('display_startup_errors', 1);
ini_set('display_errors', 1);
error_reporting(-1);

$current_interface = 'CPANEL';
require_once '../../cao/sys/config.class.php';

if(isset($_POST['selInterface'])){
    $interfaceID = pg_escape_string($_POST['selInterface']) ;

    if($_POST['selInterface'] =='120'){
        $curr_cao = new CGenDb("reddi", '12.121.21.21', 2);
        $curr_cao_tac = new CGenDb("reddi_tac", "12.121.21.21", 2);
    }elseif($_POST['selInterface'] =='121'){
        $curr_cao = new CGenDb("reddi", '212.121.21.21', 12);
        $curr_cao_tac = new CGenDb("database", "212.121.21.21", 12);
    }else{
        echo "no Interface found";
    }

            $query = new CGenRs("SELECT * FROM tac_account ",$curr_cao_tac);
            $query->first();



?>
<div class="row well well-lg">
    <div class="-md-2" >
        <span> communicator </span>
    </div>
    <div class="col-md-4"> 
        <select>
            <?php 
            if($query->rowcount()){
                while (!$query->eof() ){
                    ?>
            <option value="<?php echo $query->valueof('acc_id'); ?>"><?php echo $query->valueof('acc_name')  ?>  </option>        
            <?php
            $query->next();
                }
            }
            ?>
        </select>
    </div>
</div>

<?php
}
 <span>Select Interface (required)</span>
                </div>
                <div class="col-md-4" >
                    <select name="sel_cloud" id="sel_cloud" onchange="displayCom()" class="form-control">
                        <option value="-1">Select Interface</option>
                        <?php
                        $sel_interface_options = new CGenRS("select type_desc, type_id from lu_type where type_status = 't' and type_group = 'cloud' and type_sub_group = 'db'", $cao);
                        $sel_interface_options->first();

                        if ($sel_interface_options->rowcount()) {
                            while (!$sel_interface_options->eof()) {
                                ?>
                                <option  value="<?php echo $sel_interface_options->valueof('type_id'); ?>" ><?php echo $sel_interface_options->valueof('type_desc'); ?></option>
                                <?php
                                $sel_interface_options->next();
                            }
                        }
                        ?>
                    </select>
                </div>
                <br/>