Html kopyalama butonu

merhaba arkadaşlar elimde bir kod var ama kopyaliyor alt alta olunca kopyalamiyor sadece birini kopyaliyor yardımcı olabilirmisiniz
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<table border="0" width="100%">
<tr>
<td><div align="left">
<table border="0" width="100%" align="left">
<tr>
<td width="66" valign="top">
<button onclick="copy()" style="width: 66px; height: 37px">Kopyala</button></td>
<td><div align="left">
<textarea id="text" cols="130" rows="0">omer</textarea><br>

<div align="left">
<script type="text/javascript">
function copy(){
var text = document.getElementById('text');
var range = document.createRange();

range.selectNode(text);
window.getSelection().addRange(range);
document.execCommand('copy');

}
</script>
</td>
</tr>
</table>

</div></td>
</tr>
<tr>
<td><div align="left">
<table border="0" width="100%" align="left">
<tr>
<td width="66" valign="top">
<button onclick="copy()" style="width: 66px; height: 37px">Kopyala</button></td>
<td><div align="left">
<textarea id="text" cols="130" rows="0">ahmet</textarea><br>

<div align="left">
<script type="text/javascript">
function copy(){
var text = document.getElementById('text');
var range = document.createRange();

range.selectNode(text);
window.getSelection().addRange(range);
document.execCommand('copy');

}
</script>
</td>
</tr>
</table>

</div></td>
</tr>
</table>