Scroll table columns

HTML

<button id="left">&larr;</button>
<button id="right">&rarr;</button>

<div id="table-wrapper">
  <table border="1">
    <thead>
      <tr>
        <th pos>Heading1</th>
        <th>Heading2</th>
        <th>Heading3</th>
        <th>Heading4</th>
        <th>Heading5</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td>1</td>
        <td>12</td>
        <td>13</td>
        <td>14</td>
        <td>15</td>
      </tr>
      <tr>
        <td>2</td>
        <td>22</td>
        <td>23</td>
        <td>24</td>
        <td>25</td>
      </tr>
      <tr>
        <td>3</td>
        <td>32</td>
        <td>33</td>
        <td>34</td>
        <td>35</td>
      </tr>
      <tr>
        <td>4</td>
        <td>42</td>
        <td>43</td>
        <td>44</td>
        <td>45</td>
      </tr>
      <tr>
        <td>5</td>
        <td>52</td>
        <td>53</td>
        <td>54</td>
        <td>55</td>
      </tr>
    </tbody>
  </table>

</div>

CSS

#table-wrapper {
  width: 95%;
  float: left;
  overflow: scroll;
  background: #ddd;
}

table {
  background: #fff;
  width: 1200px;
  text-align: center;
  overflow: hidden;
  position: relative;
}

table thead tr th {
  width: 15em;
}

table thead tr th:first-child,
table tbody tr td:first-child {
  background: yellow;
  top: auto;
  left: 0.5;
  position: fixed;
  width: 6em;
}

table thead tr th:nth-child(2),
table tbody tr td:nth-child(2) {
  padding-left: 7em;
  /*to show second column behind the first*/
}

JavaScript

$(document).ready(function() {
  $("#right").on("click", function() {
var leftPos = $('#table-wrapper').scrollLeft();
    console.log(leftPos); 
    $("#table-wrapper").animate({
        scrollLeft: leftPos - 200
    }, 800);
  });

  $("#left").on("click", function() {
   var leftPos = $('#table-wrapper').scrollLeft();
    console.log(leftPos); 
    $("#table-wrapper").animate({
        scrollLeft: leftPos + 200
    }, 800);
  });

});