function getData(button){

xmlHttp=GetXmlHttpObject();
if (xmlHttp==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  } 
  
  
var url = "data/" + button + ".html"
//var url="data.php?button=" + button;

xmlHttp.onreadystatechange=function(){
    
    
    if (xmlHttp.readyState==4)
{
    //document.getElementById("data").className = "";
    document.getElementById("data").innerHTML=xmlHttp.responseText;
}
    
    
}
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
}





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;
}