Exemple de code de la propriété CSS visibility.

<style type="text/css">
.conteneurtable, .conteneurtable td {
  border:1px solid #666; 
}
.conteneur {
  width:300px; 
  border:1px dotted #666; 
  margin-bottom: 5px; 
}
.conteneur p {
  margin:0; 
  position:relative; 
  left:0px; top:0px; 
  width:300px; height:60px; 
  background-color: #cceebd; 
}
.hidden {
  visibility : hidden
}
.visible {
  visibility : visible
}
.collapse {
  visibility : collapse; 
}
</style>
<b>visibility: visible</b>
<div class="conteneur">
  <p class="defaut visible">Je suis visible</p>
</div>
<b>visibility: hidden</b>
<div class="conteneur">
  <p class="defaut hidden">Je ne suis pas visible</p>
</div>
<b>visibility: collapse & visibility: collapse<br> sur cellule</b>
<table width="300px" border="1" class="conteneurtable">
  <tr>
    <td>1</td>
    <td>2</td>
  </tr>
  <tr>
    <td>3</td>
    <td class="collapse">3</td>
  </tr>
  <tr>
    <td>5</td>
    <td class="hidden">6</td>
  </tr>
</table>
<b>visibility: hidden & visibility: collapse<br> sur colonne et ligne</b>
<table width="300px" border="1" class="conteneurtable">
<col id="col1"><col id="col2" class="collapse"><col id="col3">
<tr id="row1">
    <td> 1 </td>
    <td> 2 </td>
    <td> 3 </td>
</tr>
<tr id="row2" class="hidden">
    <td> 4 </td>
    <td> 5 </td>
    <td> 6 </td>
</tr>
<tr id="row3">
    <td> 7 </td>
    <td> 8 </td>
    <td> 9 </td>
</tr>
<tr id="row4" class="collapse">
    <td> 10 </td>
    <td> 11 </td>
    <td> 12 </td>
</tr>
<tr id="row5" >
    <td> 13 </td>
    <td> 14 </td>
    <td> 15 </td>
</tr>
</table>