// var http_request = false; // use global var if we want multiple calls to overwrite each other ?
	var http_request_methods = new Array();


	var isIE = false;
	var ua = navigator.userAgent.toLowerCase();

	if ((ua.indexOf("msie") != -1) && (ua.indexOf("opera") == -1) && (ua.indexOf("webtv") == -1)) isIE = true; 


	function makeXMLRequest(scripturl,func,params) {

		//http_request = false;

		if (window.XMLHttpRequest) { // Mozilla, Safari,...
			http_request = new XMLHttpRequest();
			if (http_request.overrideMimeType) {
				http_request.overrideMimeType('application/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('Giving up :( Cannot create an XMLHTTP instance');
			return true; // allow href attribute to load new page as request has failed
		}

		if (params['indicator']) {
			document.getElementById(params['indicator'][0]).src = params['indicator'][1];
		}

		http_request.onreadystatechange = function () { return ajaxUpdate(http_request,func,params) }
		http_request.open('GET', scripturl, true);
		http_request.send(null);
		
		return false; // stop href from being loaded

	}

	function ajaxUpdate(http_request,func,params) {

		try {

			if (http_request.readyState == 4) {

				if (http_request.status == 200) {
					
					if (params['indicator']) {
						document.getElementById(params['indicator'][0]).src = params['indicator'][2];
					}
					
					if (http_request_methods[func](http_request.responseXML, params)) {
						return false;
					}
					else {
						if (params['input']) {
							window.location = params['input'].href;
						}						
						return true;
					}

				
				} else {
				    // alert('There was a problem with the request.');
					if (params['indicator']) {
						document.getElementById(params['indicator'][0]).src = params['indicator'][2];
					}
					if (params['input']) {
						window.location = params['input'].href;
					}
					return true;
				}
			}
		}
		catch(e) {
			// alert('Caught Exception: ' + e.description);
			if (params['indicator']) {
				document.getElementById(params['indicator'][0]).src = params['indicator'][2];
			}
			if (params['input']) {
				window.location = params['input'].href;
			}
			
			return true;
		}
	}
	
	
	http_request_methods['updateComments'] = function (responseXML, params) {
		
		var commentarr = responseXML.getElementsByTagName('comment');
		
		var tmpstr = "";
		
		for (var i=0;i<commentarr.length;i++) {
			
			var id = getTextFromXMLNode(commentarr[i].getElementsByTagName('id')[0]);
			var userid = getTextFromXMLNode(commentarr[i].getElementsByTagName('userid')[0]);
			var usersafename = getTextFromXMLNode(commentarr[i].getElementsByTagName('usersafename')[0]);
			var userfirstname = getTextFromXMLNode(commentarr[i].getElementsByTagName('userfirstname')[0]);
			var usersurname = getTextFromXMLNode(commentarr[i].getElementsByTagName('usersurname')[0]);
			var userfullname = getTextFromXMLNode(commentarr[i].getElementsByTagName('userfullname')[0]);
			var text = getTextFromXMLNode(commentarr[i].getElementsByTagName('text')[0]);
			var created = getTextFromXMLNode(commentarr[i].getElementsByTagName('created')[0]);

			if (commentarr[i].getElementsByTagName('avgrating').length) {
                var avgrating = getTextFromXMLNode(commentarr[i].getElementsByTagName('avgrating')[0]);
    
                if (avgrating.length > 0) {
                    var ratingstr = avgrating + "<br />";
                }
                else {
                     var ratingstr = "<br />";
                }
            }
            else {
                var ratingstr = "<br />"
            }

			if (commentarr[i].getElementsByTagName('alertlink').length) {
                var alertlink = "<span class=\"contentcommentalert\">" + getTextFromXMLNode(commentarr[i].getElementsByTagName('alertlink')[0]) + "</span>";
            }
            else {
                var alertlink = "";
            }
            
			if (userid == params['authorid'] && userid != 0)
				var classstr = " highlight";
			else
				var classstr = "";
            
            var tmpname = userfullname;
            
            if (tmpname.length < 1) {
            	tmpname = userfirstname + " " + usersurname;
            }
            
            if (commentarr[i].getElementsByTagName('npref').length) {
                
                var npref = getTextFromXMLNode(commentarr[i].getElementsByTagName('npref')[0]);
    
                if (npref.length > 0) {
                    var tmparr = npref.split("^");
                    var tmpname = tmparr[0];
                }
            }
            
			tmpstr += "<div class=\"contentcommentblock" + classstr + "\"><p>" + tmpname + " " + created + ratingstr + text + alertlink + "</p></div>";
			
		}
	   
		document.getElementById(params['target']).innerHTML = tmpstr;
		
		document.getElementById(params['navistr']).innerHTML = getTextFromXMLNode(responseXML.getElementsByTagName('navistr')[0]);
		document.getElementById(params['numnavi']).innerHTML = getTextFromXMLNode(responseXML.getElementsByTagName('numnavi')[0]);

        if (responseXML.getElementsByTagName('averages').length > 0) {

            var averages = responseXML.getElementsByTagName('averages')[0];

            document.getElementById('avgrating').innerHTML = getTextFromXMLNode(averages.getElementsByTagName('avgrating')[0]);

			if (params['numprefs'] > 1) { // if just one pref we have only shown an average
				for (var i=1; i<=params['numprefs'];i++) {
					document.getElementById('value'+i).innerHTML = getTextFromXMLNode(averages.getElementsByTagName('value'+i)[0]);
				}
			}
		}
		
		sf_addOnClickHandlers();
		
		return true;
	}
	
	function getTextFromXMLNode(node) {

		if (isIE) {
			return node.text;
		}
		else {
			if (node.hasChildNodes()) {
				return node.childNodes[0].nodeValue;
			}
			else {
				return "";
			}
		}
	}
	
	function expandCommentForm(link,idstr) {
		
		var style = document.getElementById(idstr).style;
		
		if (style.display != 'none') {
			style.display = 'none';
			
			// need to keep anchor at the end of the url
			var anchor = link.href.match(/#[^&]+/);
			if (anchor != null) {
				 link.href = link.href.replace(/#[^&]+/,'');
			}			
			if (link.href.match(/\?/)) {
				 link.href += '&';
			}
			else {
				 link.href += '?';
			}
			
			link.href += 'showcommentform=1#contentcomments';
			
			/*if (anchor != null) {
				link.href += anchor[0];
			}*/
			
			link.innerHTML = 'Show Comment Form';
		}
		else {
			style.display = 'block';
			link.href = link.href.replace(/([\&\?])showcommentform=[0-9]*/i,''/*'$1showcommentform=0'*/);
			link.href = link.href.replace(/#[^&]+/,'');
			link.innerHTML = 'Hide Comment Form';
		}
		
		link.blur();
		
		return false;
	}