var xmlHttp

function update_stats(str, str2, str3) { 
	xmlHttp=GetXmlHttpObject()
	if (xmlHttp==null)
	 {
	 alert ("Browser does not support HTTP Request")
	 return
	 }
	var url="/location_to_time.php"
	url=url+"?data="+str
	url=url+"&flight_id="+str2
	url=url+"&series_type="+str3
	//alert(url);
	xmlHttp.onreadystatechange=stateChanged 
	xmlHttp.open("GET",url,true)
	xmlHttp.send(null)
}

function stateChanged() { 
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete") { 
	var ajaxarray=xmlHttp.responseText .split(",");
	var x_value = parseFloat(ajaxarray[0]);
	//var y_value = parseFloat(ajaxarray[1]);
	var y_value = ajaxarray[1];
	update_chart_from_map(x_value,y_value);
	//alert(x_value + ':' + y_value);
 } 
}
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;
}