function remove(idx){
    var formData = new FormData();
    formData.append('come_idx','5974');
    formData.append('p','1');
    formData.append('l',idx);
    formData.append('my','post');
    fetch('https://www.inven.co.kr/board/bbs/include/multi_delete.php',{
        method:'POST',
        body:formData
    });
}
function removeAll(){
  $('td.num>span').each(function(idx,value){
   const boardId = value.textContent;
   remove(boardId);
 });
 location.reload();
}
removeAll();

글삭기다