//***** AJAX Application
//***** CTNM ~ www.ctnm.de
//***** Steffen Blankenbach
//***** 23.02.2007

function removeFromStack(url) {

	http_request = false;

	if (window.XMLHttpRequest) { // Mozilla, Safari,...
		http_request = new XMLHttpRequest();
		if (http_request.overrideMimeType) {
			http_request.overrideMimeType('text/xml');
		}
	} 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('Ende :( Kann keine XMLHTTP-Instanz erzeugen');
		return false;
	}
	http_request.onreadystatechange = setAddBtn;
	http_request.open('GET', url, true);
	http_request.send(null);
}

function setAddBtn() {

	if (http_request.readyState == 4) {
		if (http_request.status == 200) {

			if (http_request.responseXML) {
				var xmldoc = http_request.responseXML;
				var values = xmldoc.getElementsByTagName('values').item(0);
				var exhibitor = values.childNodes;
				var count = 0;
				
				for(i=0; i<exhibitor.length; i++) {
					var idExhibitor = exhibitor[i].childNodes[0].firstChild.nodeValue;
					var idSession = exhibitor[i].childNodes[1].firstChild.nodeValue;
					var action = exhibitor[i].childNodes[2].firstChild.nodeValue;
					if(action == "remove") {
						var newLink = '<a id="ex'+idExhibitor+'" onclick="addToStack(\'addStack.php?exhibitor='+idExhibitor+'&amp;user='+idSession+'\'); return false;" href="#" title="Kontakt von der Merkliste entfernen"><img id="btn'+idExhibitor+'" border="0" src="sitepix/btn_addstack.gif" alt="Kontakt von der Merkliste entfernen" />';
						document.getElementById('stack'+idExhibitor).innerHTML = newLink;
					} else {
						count++;
					}
					document.getElementById('stackCount').innerHTML = count;
				}
			}
		} else {
			alert('Bei dem Request ist ein Problem aufgetreten.');
		}
	}
}