Hide popup when mouse moves off

I'm trying to add a popup when a td is mousedover. Each row has multiple td's and the popup should only work on the first one. This works as long as mouseout is in the same column. That is, if I move the mouse up and down, the popup appears and disappears as expected. But if I move the mouse horizontally into the next td, the popup doesn't disappear. I created a jsfiddle for this but the popup isn't working. The console is saying the javascript function isn't defined but it works fine here so I must have something wrong in the jsfiddle setup. Here's the code I am using. Td's are being used because this is the code I was given. Can anyone see what is needed to get the popup to hide no matter how the mouse moved?

EDITED to solve the problem.

    <style>
    #pop-description{
      display              : none;
      position             : absolute;
      z-index              : 99999;
      left                 : 0px;
      padding              : 10px;
      background           : #3AB9AE;
      border               : 1px solid #9a9a9a;
      margin               : 0px;
    }
    </style>

    <script>
    $(document).ready(function(){
    function ShowDescription(id) { 
     var position = $('.class-desc-'+id).position();
     var desc = $('#desc-'+id).val();
     $('#pop-description').css('top', position.top);
     $('#pop-description').text(desc);
     //$('#pop-description').toggle();

     $('.class-desc-'+id).mouseenter(function() {
       $('#pop-description').css('display', 'block');

     }).mouseleave(function() {
       $('#pop-description').css('display', 'none');
     });  
    }
    });
    </script>

    <div style="display:relative;"><div id="pop-description" style="display:none;"></div></div>
    <table>
    <tr>
    <td class="class-desc-0" onmouseOver="ShowDescription('0');">title</td>
    <td>Address</td>
    <td>State</td>
    <input type="hidden" name="desc-0" value="first test" id="desc-0">
    </tr>

    <tr>
    <td class="class-desc-1" onmouseOver="ShowDescription('1');">title</td>
    <td>Address</td>
    <td>State</td>
    <input type="hidden" name="desc-1" value="second test" id="desc-1">
    </tr>

    <tr>
    <td class="class-desc-2" onmouseOver="ShowDescription('2');">title</td>
    <td>Address</td>
    <td>State</td>
    <input type="hidden" name="desc-2" value="third test" id="desc-2">
    </tr>
    </table>  
      

I think you are overthinking it. Here is what I would do. I would use jQuery as demonstrated below.

1. Trigger the action you need on mouseenter
2. Initiate the opposite action on mouseleave

$(function() {

  $(".toggle").mouseenter(function() {
    // Your code goes below: initiate first action
    $(this).addClass("showOff");

  }).mouseleave(function() {

    // Your code goes below: Initiate opposite action
    $(".toggle").removeClass("showOff");

  });

});

div {
  cursor: pointer;
  width: 200px;
  height: 200px;
  line-height: 200px;
  text-align: center;
  transition: all 2s;
}

.showOff {
  width: 200px;
  height: 200px;
  line-height: 200px;
  text-align: center;
  background: orange;
  transition: all 2s;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="toggle">Hove over me</div>

Note: In your case, you show the popup on mouseenter and hide it on mouseleave