function url_abfragen(url,target)
{
	document.getElementById(target).innerHTML = 'Checking for reciprocal link...';
	if (window.XMLHttpRequest)
	{
		req = new XMLHttpRequest();
		req.onreadystatechange = function()
		{
			url_inhalt_ausgeben(target);
		}
		req.open("GET", "/"+url, true);
		req.send();
	}
	else if (window.ActiveXObject)
	{
		req = new ActiveXObject("Microsoft.XMLHTTP");
		if (req)
		{
			req.onreadystatechange = function()
			{
				url_inhalt_ausgeben(target);
			}
			req.open("GET", "/"+url, true);
			req.send(null);
		}
	}
}


function url_inhalt_ausgeben(target)
{
	if (req.readyState == 4) // only if req is "loaded"
	{
		if (req.status == 200 || req.status == 304)// only if "OK"
		{
			results = req.responseText;
			// document.getElementById(target).innerHTML = results;
		}
		else
		{
			document.getElementById(target).innerHTML= "Error:\n" + req.statusText;
		}
	}
}

function makePOSTRequest(url, parameters)
{
	http_request = false;
	if (window.XMLHttpRequest) // Mozilla, Safari,...
	{
		http_request = new XMLHttpRequest();
    if (http_request.overrideMimeType)
    {
			// set type accordingly to anticipated content type
			//http_request.overrideMimeType('text/xml');
			http_request.overrideMimeType('text/html');
     }
	}
	else if (window.ActiveXObject)	// IE
	{
		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 = alertContents;
	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);
}


function alertContents()
{
	if (http_request.readyState == 4) {
  	if (http_request.status == 200) {
  		// alert(http_request.responseText);
  		result = http_request.responseText;
     	// document.getElementById('myspan').innerHTML = result;
     	document.include.myspan.value = result;
    }
    else
    {
    	alert('There was a problem with the request.');
		}
	}
}

function check_reciprocal(felder)
{
	var poststr = "";
	var	feld = document.getElementById(felder);

	// alert('NAME:'+feld.name+'\nTYP: '+feld.type+'\nWert:'+feld.value);

	if (feld.type == "text" || feld.type == "textarea")
	{
		wert = feld.value;
		poststr += "todo=check&"+felder+"=" + escape(encodeURI(wert));
	}
	
	makePOSTRequest("/check_reciprocal.php", poststr);
}