var http_request = false;

// HTTP-POST-Request

function get(obj)
{
  var poststr = "name=" + escape( document.getElementById("name").value ) +
				"&email=" + escape( document.getElementById("email").value ) +
				"&homepage=" + escape( document.getElementById("homepage").value ) +
				"&herkunft=" + escape( document.getElementById("herkunft").value ) +
				"&mitteilung=" + escape( document.getElementById("mitteilung").value );

  makePOSTRequest('./content/newguestentry.php', poststr);
}

function makePOSTRequest(url, parameters) 
{
  http_request = false;
  if (window.XMLHttpRequest) 
  {
	 http_request = new XMLHttpRequest();
	 if (http_request.overrideMimeType) 
	 {
		http_request.overrideMimeType('text/html');
	 }
  } 
  else if (window.ActiveXObject) 
  {
	 try 
	 {
		http_request = new ActiveXObject("Msxml2.XMLHTTP");
	 }
	 catch (e) 
	 {
		try 
		{
		   http_request = new ActiveXObject("Microsoft.XMLHTTP");
		} 
		catch (e) {}
	 }
  }

  if (!http_request) {
	 alert('Cannot create XMLHTTP instance');
	 return false;
  }
  
  http_request.onreadystatechange = pushContent;
  http_request.open('POST', url, true);
  http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
  http_request.setRequestHeader("Content-length", parameters.length);
  http_request.setRequestHeader("Connection", "close");
  http_request.send(parameters);
}

// HTTP-GET-Request

function macheRequest(url)
{
	http_request = false;
    if (window.XMLHttpRequest)
    {
		http_request = new XMLHttpRequest();
		if (http_request.overrideMimeType) 
		{
		http_request.overrideMimeType('text/html');
		} 
	}	
	else if (window.ActiveXObject) 
	{
	try 
		{
		http_request = new ActiveXObject("Msxml2.XMLHTTP");
		} 
	catch (e) 
		{
		try
			{
			http_request = new ActiveXObject("Microsoft.XMLHTTP");
			} 
	catch (e) 
			{
			}
		}
	}

	if (!http_request) 
	{
	alert('Ende :( Kann keine XMLHTTP-Instanz erzeugen');
	return false;
	}
	//url = url + "#top";
	http_request.onreadystatechange = pushContent;
    http_request.open('GET', url, true);
    http_request.send(null);
}

// HTTP-Request-Ergebnisse anzeigen (GET und POST)

function pushContent() 
{
if (http_request.readyState == 4) 
	{
	if (http_request.status == 200) 
		{
		div = document.getElementById('content');
		div.innerHTML = http_request.responseText;
		div.scrollTop=0;
		}
		else
		{
        alert('Bei dem Request ist ein Problem aufgetreten.');
		}
	}
}