var content = "";
var xmlhttp

function loadXMLDoc(url)
{
   loadXMLDoc2(url, -1);
}

function loadXMLDoc2(url)
{

xmlhttp=null;
if (window.XMLHttpRequest)  {  xmlhttp=new XMLHttpRequest()  }
else if (window.ActiveXObject)  {  xmlhttp=new ActiveXObject("Microsoft.XMLHTTP")  }
if (xmlhttp!=null)
  {
  xmlhttp.onreadystatechange=state_Change;
  xmlhttp.open("GET",url,true);
  xmlhttp.send(null);

  }
else
  {
  alert("Your browser does not support XMLHTTP.")
  }
 
}

function menu1(){loadXMLDoc('index-1.html');}
function menu2(){loadXMLDoc('index-2.html');}
function menu3(){loadXMLDoc('index-3.html');}
function menu5(){loadXMLDoc('index-5.html');}

var Timer;

function state_Change()
{
if (xmlhttp.readyState==4)
  {
  if (xmlhttp.status==200)
  {
   document.getElementById('content').innerHTML=xmlhttp.responseText;
  }
  else
  {
	alert("Problem retrieving data:" + xmlhttp.statusText)
  }
  }
}