<table>
<tr>
<td id=td1 >10
</td>
</tr>
</table> <script language="javascript">
var intval
function counter(){
document.getElementById('td1').innerText=document.getElementById('td1').innerText/1-1
if ( document.getElementById('td1').innerText=='0')
clearInterval(intval)
}
intval=setInterval("counter()",1000);
</script>
<tr>
<td id=td1 >10
</td>
</tr>
</table> <script language="javascript">
var intval
function counter(){
document.getElementById('td1').innerText=document.getElementById('td1').innerText/1-1
if ( document.getElementById('td1').innerText=='0')
clearInterval(intval)
}
intval=setInterval("counter()",1000);
</script>
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