// JavaScript Document

var xmlhttp;
var url;
var str;
var elem;
var waiting;

// Performs the AJAX operation, dependent on the url and str variables above
function request(method) {
	if (window.XMLHttpRequest) {
  		xmlhttp = new XMLHttpRequest();
 		xmlhttp.onreadystatechange = xmlhttpChange;
		if (method == "get") {
 			xmlhttp.open("GET",url,true);
  			xmlhttp.send(null);
		} else if (method == "post") {
			xmlhttp.open("POST",url,true);
			xmlhttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded; charset=UTF-8");
			xmlhttp.send(str);
		}
  	}
	
	// code for IE
	else if (window.ActiveXObject) {
  		xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
		if (xmlhttp) {
    		xmlhttp.onreadystatechange = xmlhttpChange;
   			if (method == "get") {
 				xmlhttp.open("GET",url,true);
  				xmlhttp.send();
			} else if (method == "post") {
				xmlhttp.open("POST",url,true);
				xmlhttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded; charset=UTF-8");
				xmlhttp.send(str);
			}
    	}
 	}
}

// Displays a loading/waiting message and then finally the output of the request
function xmlhttpChange() {
	// if xmlhttp shows "loaded"
	if (xmlhttp.readyState==4) {
 		// if "OK"
  		if (xmlhttp.status==200) {
			document.getElementById(elem).innerHTML = xmlhttp.responseText;
   		} else {
    		document.getElementById(elem).innerHTML = "There was a problem in processing your submission";
    	}
  	} else if (xmlhttp.readyState==1) {
		document.getElementById(elem).innerHTML = waiting;
	}
}

function current_display(page) {
	str = "page="+page;
	url = "current.php?"+str;
	elem = "feature";
	waiting = "Loading next page...";
	request("get");
	document.getElementById('title').innerHTML = "Current";
}
function shows() {
	str = "";
	url = "shows.php";
	elem = "feature";
	waiting = "Loading shows...";
	request("get");
	document.getElementById('title').innerHTML = "Shows";
}
function who() {
	str = "";
	url = "who.php";
	elem = "feature";
	waiting = "Loading bio...";
	request("get");
	document.getElementById('title').innerHTML = "Who Are You?";
}
function contact() {
	str = "";
	url = "contact.php";
	elem = "feature";
	waiting = "Loading contacts...";
	request("get");
	document.getElementById('title').innerHTML = "Make Contact";
}