<script>
function myopen(obj)
{
  var c1 = document.getElementById("c1");
  var l1 = document.getElementById("l1");
  obj.parentNode.innerHTML = loadHTML(obj.href);
  return false;
}

function loadHTML(sURL)
{
  var request=null;
  if(!request) try {
    request=new ActiveXObject('Msxml2.XMLHTTP');
  } catch (e){}
  if(!request) try {
    request=new ActiveXObject('Microsoft.XMLHTTP');
  } catch (e){}
  if(!request) try {
    request=new XMLHttpRequest();
  } catch (e){}
  if(!request)
    return "";
  request.open('GET', sURL, false);
  request.send(null);
  return request.responseText;
}
</script>

<table border= 1 >
<td><a href='2.htm' onclick='return myopen(this)'>Ссылка</a></td>
<td><a href='3.htm' onclick='return myopen(this)'>Ссылка</a> </td>
</table>