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Editorial Team
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Asked: 2026-05-26T09:44:37+00:00

I want to know how can I disable and enable the highlighting on an

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I want to know how can I disable and enable the highlighting on an HTML table using Javascript by clicking an html button.

Here are my codes:

tabletest.html

<html>
<head>
<script type="text/javascript">
 function disableTable() {
  document.getElementbyId('tblTest').disabled = true;
 }

 function enableTable() {
  document.getElementbyId('tblTest').disabled = false;
 }
</script>

<style type="text/css">
 table#tblTest {
  width: 100%;
  margin-top: 10px;
  font-family: verdana,arial,sans-serif;
  font-size:12px;
  color:#333333;
  border-width: 1px;
  border-color: #666666;
  border-collapse: collapse;
 }

 table#tblTest tr.highlight td {
  background-color: #8888ff;
 }

 table#tblTest tr.normal {
  background-color: #ffffff;
 }

 table#tblTest th {
  white-space: nowrap; 
  border-width: 1px;
  padding: 8px;
  border-style: solid;
  border-color: #666666;
  background-color: #dedede;
 }

 table#tblTest td {
  border-width: 1px;
  padding: 8px;
  border-style: solid;
  border-color: #666666;
  background-color: #ffffff;
 }
</style>
</head>

<body>
 <table id="tblTest">
  <thead>
   <tr>
    <th>Name</th>
    <th>Address</th>
   </tr>
</thead>
<tbody>
    <tr onMouseOver="this.className='highlight'" onMouseOut="this.className='normal'" >
        <td>Tom</td>    
        <td>UK </td>
    </tr>
    <tr onMouseOver="this.className='highlight'" onMouseOut="this.className='normal'" >
        <td>Hans</td>   
        <td>Germany</td>
    </tr>
    <tr onMouseOver="this.className='highlight'" onMouseOut="this.className='normal'" > 
        <td>Henrik</td> 
        <td>Denmark</td>
    </tr>
    <tr onMouseOver="this.className='highlight'" onMouseOut="this.className='normal'" >
        <td>Lionel</td> 
        <td>Italy</td>
    </tr>
    <tr onMouseOver="this.className='highlight'" onMouseOut="this.className='normal'" >
        <td>Ricardo</td>    
        <td>Brazil</td>
    </tr>
    <tr onMouseOver="this.className='highlight'" onMouseOut="this.className='normal'" >
        <td>Cristiano</td>  
        <td>Portugal</td>
    </tr>
</tbody>
</table>
 <input type="button" onclick="disableTable();" value="Disable" />
 <input type="button" onclick="enableTable()" value="Enable" />
 </body>
</html>

Whenever I click the Disable button the table highlighting is still enabled.
I’m kinda new to this so I really need your help.

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1 Answer

  1. Editorial Team
    <html>
<head>
<script type="text/javascript">
disable = new Boolean();
 function highlight(a) {
  if(disable==false)a.className='highlight'
 }

 function normal(a) {
  a.className='normal'
 }
</script>

<style type="text/css">
 table#tblTest {
  width: 100%;
  margin-top: 10px;
  font-family: verdana,arial,sans-serif;
  font-size:12px;
  color:#333333;
  border-width: 1px;
  border-color: #666666;
  border-collapse: collapse;
 }

 table#tblTest tr.highlight td {
  background-color: #8888ff;
 }

 table#tblTest tr.normal {
  background-color: #ffffff;
 }

 table#tblTest th {
  white-space: nowrap; 
  border-width: 1px;
  padding: 8px;
  border-style: solid;
  border-color: #666666;
  background-color: #dedede;
 }

 table#tblTest td {
  border-width: 1px;
  padding: 8px;
  border-style: solid;
  border-color: #666666;
  background-color: #ffffff;
 }
</style>
</head>

<body>
 <table id="tblTest">
  <thead>
   <tr>
    <th>Name</th>
    <th>Address</th>
   </tr>
</thead>
<tbody>
    <tr onMouseOver="highlight(this)" onMouseOut="normal(this)" >
        <td>Tom</td>    
        <td>UK </td>
    </tr>
    <tr onMouseOver="highlight(this)" onMouseOut="normal(this)" >
        <td>Hans</td>   
        <td>Germany</td>
    </tr>
    <tr onMouseOver="highlight(this)" onMouseOut="normal(this)" > 
        <td>Henrik</td> 
        <td>Denmark</td>
    </tr>
    <tr onMouseOver="highlight(this)" onMouseOut="normal(this)" >
        <td>Lionel</td> 
        <td>Italy</td>
    </tr>
    <tr onMouseOver="highlight(this)" onMouseOut="normal(this)" >
        <td>Ricardo</td>    
        <td>Brazil</td>
    </tr>
    <tr onMouseOver="highlight(this)" onMouseOut="normal(this)" >
        <td>Cristiano</td>  
        <td>Portugal</td>
    </tr>
</tbody>
</table>
 <input type="button" onclick="disable = true;" value="Disable" />
 <input type="button" onclick="disable = false;" value="Enable" />
 </body>
</html>

    Fixed your code. Use a function to check if it’s disabled, if it isn’t, then highlight. If it is, then don’t. Simple enough.

    Demo

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