var oldreply;
function ajaxFunction()
  {
  var xmlHttp;
  try
    {
    // Firefox, Opera 8.0+, Safari
    xmlHttp=new XMLHttpRequest();
    }
  catch (e)
    {
    // Internet Explorer
    try
      {
      xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
      }
    catch (e)
      {
      try
        {
        xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
        }
      catch (e)
        {
        return false;
        }
      }
    }
    xmlHttp.onreadystatechange=function()
      {
      if(xmlHttp.readyState==4 && oldreply != xmlHttp.responseText)
        {
            //if(document.getElementById("name").value != '')
                //{
                    var newreply = xmlHttp.responseText;
                    document.getElementById("results").innerHTML = xmlHttp.responseText;
                    oldreply = newreply;
                //}else
                //{
                    //document.getElementById("results").style.visibility = 'hidden';
            //        oldreply = '';
                //}
            if(xmlHttp.responseText == '<table></table>'){
                document.getElementById("results").innerHTML = 'No results!<br/>';
            }
        }else
        {
            document.getElementById("results").innerHTML = document.getElementById("results").innerHTML;
            //document.getElementById("results").style.visibility = 'visible';
        }
        
       }
    xmlHttp.open("GET","new_select_companies.php?name="+document.getElementById("company_name").value,true);
    xmlHttp.send(null);
  }