var pos; // variable for posting information
function loadXMLPosDoc(url, posData)
	{
    	// branch for native XMLHttpRequest object
    	if(window.XMLHttpRequest)
			{
		        pos = new XMLHttpRequest();
		        pos.onreadystatechange = processPosChange;
		        pos.open("POST", url, false);
				pos.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
		        pos.send(posData);
    			// branch for IE/Windows ActiveX version
    		}
			else if(window.ActiveXObject)
				{
        			pos = new ActiveXObject("Microsoft.XMLHTTP");

					if(pos)
						{
				            pos.onreadystatechange = processPosChange;
				            pos.open("POST", url, false);
							pos.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
				            pos.send(posData);
				        }
    			}
	}

function grabPosXML(tagName)
	{
		return pos.responseXML.documentElement.getElementsByTagName(tagName)[0].childNodes[0].nodeValue;
	}

function processPosChange()
	{
	    // page loaded "complete"
	    if(pos.readyState == 4)
			{
		        // page is "OK"
		        if(pos.status == 200)
					{
						if(grabPosXML("posStatus") == 'NOTOK')
							{
								alert('Interner Mail-Fehler! Bitte probieren Sie es später nochmals.');
							}
					}
			}
	}