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<html> 
<head> 
<script type="text/javascript"> 
function caption(){ 
    var x=document.getElementById('myTable').createCaption() 
    x.innerHTML="<b>My table caption</b>" 
} 
</script> 
</head> 
 
<body> 
<table id="myTable" border="1"> 
    <tr> 
        <td>d</td> 
        <td>d</td> 
    </tr> 
    <tr> 
        <td>d</td> 
        <td>d</td> 
    </tr> 
    <tr> 
        <td>Row3 cell1</td> 
        <td>Row3 cell2</td> 
    </tr> 
</table> 
<form> 
<input type="button" onclick="caption()" value="Create caption"> 
</form> 
</body> 
 
</html> 
 
            
          
   
    
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