<tr>
  <td width="5%">$user_id </td>
  <td><a href="?">$user_login</a></td>
  <td><a href="?">$user_profile_name</a></td>
  <td><a href="?">$user_mail</a></td>
  <td>$user_ip_last</td>
  <td>$user_date_last</td>
  <td>  0  </td>
  <td align="center" width="5%"><input type="checkbox" name="user_id[$user_id]" value="1" class="check" /></td>
</tr>

element.innerHTML = arrhtml[id];

var temp = document.createElement('div');
temp.innerHTML = arrhtml[id];
while (element.firstChild) element.removeChild(element.firstChild);
while (temp.firstChild) element.appendChild(temp.firstChild);

var nodes = loadXMLString(arrhtml[id]).documentElement;
while (element.firstChild) element.removeChild(element.firstChild);
while (nodes.firstChild) element.appendChild(nodes.firstChild);

while (nodes.firstChild) element.appendChild(nodes.firstChild);

var child; for(var i= 0 ; child=nodes.childNodes[i]; i++) element.appendChild(child.cloneNode(true));