var inghams = new Array();

inghams["offices"] = "includes/offices.php";
inghams["employment"] = "includes/employment.html";
inghams["family"] = "includes/family.html";
inghams["personal"] = "includes/pi.html";
inghams["conv"] = "includes/conveyancing.html";
inghams["wills"] = "includes/wills.html";
inghams["index"] = "includes/index.html";
inghams["contact"] = "includes/contact.html";

function createXHRObj() {
	var xhr = false;
	try {
		xhr = new XMLHttpRequest();
	}
	catch(e) {
		xhr = new ActiveXObject("Microsoft.XMLHTTP");
	}
	return xhr;
}


function AJAXObj(url, callbackFunction) {
	var that=this;
	this.updating = false;
	this.abort = function() {
		if (that.updating) {
			that.updating=false;
			that.AJAX.abort();
		that.AJAX=null;
		}
	}
	this.update = function(passData,postMethod) { 
	if (that.updating) { return false; }
		that.AJAX = null;
		if (window.XMLHttpRequest) {
			that.AJAX=new XMLHttpRequest();
		} else {
			that.AJAX=new ActiveXObject("Microsoft.XMLHTTP");
		}
		if (that.AJAX==null) {
			return false;
		} else {
			that.AJAX.onreadystatechange = function() {
				if (that.AJAX.readyState==4) {
					that.updating=false;
					that.callback(that.AJAX.responseText,that.AJAX.status,that.AJAX.responseXML);
					that.AJAX=null;
				}
			}
			that.updating = new Date(); 
			if (/post/i.test(postMethod)) {
				var uri=urlCall+'?'+that.updating.getTime();
				that.AJAX.open("POST", uri, true);
				that.AJAX.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
				that.AJAX.setRequestHeader("Content-Length", passData.length);
				that.AJAX.send(passData);
			} else {
				var uri=urlCall+'?'+passData+'&timestamp='+(that.updating.getTime()); 
				that.AJAX.open("GET", uri, true);
				that.AJAX.send(null);
			}
			return true;
		}
	}
	var urlCall = url;
	this.callback = callbackFunction || function () { };
}

function pageView(responseText,responseStatus) {
	if (responseStatus == 200)
	{
		// update page
		document.getElementById("ajaxoutput").innerHTML = responseText;
	}
	else
	{
		document.getElementById("ajaxoutput").innerHTML = reponseStatus + "An error occurred";
	}
}

function showPage(myPage) {
	var ajaxReq = new AJAXObj(inghams[myPage],pageView);
	ajaxReq.update();
}