var xmlHttp
 
function nav_change(str,query)
{
if (str.length==0)
  { 
  document.getElementById("tabs_content").innerHTML="";
  return;
  }
xmlHttp=GetXmlHttpObject()
if (xmlHttp==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  } 
var url = "includes/nav_"+str+".inc.php?page="+query;
if (xmlHttp!=null)
  {
  xmlHttp.onreadystatechange=stateChange
  xmlHttp.open("GET",url,true)
  xmlHttp.send(null)
  }
else
  {
  alert("Your browser does not support XMLHTTP.")
  }
return false;
}
 
 
function stateChange() 
{ 
if (xmlHttp.readyState==4)
{ 
document.getElementById("subNav").innerHTML=xmlHttp.responseText;
}
}
 
function GetXmlHttpObject()
{
var xmlHttp=null;
try
  {
  // Firefox, Opera 8.0+, Safari
  xmlHttp=new XMLHttpRequest();
  }
catch (e)
  {
  // Internet Explorer
  try
    {
    xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
    }
  catch (e)
    {
    xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
    }
  }
return xmlHttp;
}