function getuid(){
	var ajaxRequest;
	
	try{
		ajaxRequest = new XMLHttpRequest();
	} catch (e){
		try{
			ajaxRequest = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try{
				ajaxRequest = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e){
				alert("Your browser is not supported by the chatroom.");
				return false;
			}
		}
	}
	ajaxRequest.onreadystatechange = function(){
		if(ajaxRequest.readyState == 4){
			user = ajaxRequest.responseText;
		}
	}
	ajaxRequest.open("POST", "uidecho.php", true);
	ajaxRequest.send(null); 
}

function process_online(){
	var ajaxRequest2;
	
	try{
		ajaxRequest2 = new XMLHttpRequest();
	} catch (e){
		try{
			ajaxRequest2 = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try{
				ajaxRequest2 = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e){
				alert("Your browser is not supported by the chatroom.");
				return false;
			}
		}
	}
	ajaxRequest2.onreadystatechange = function(){
		if(ajaxRequest2.readyState == 4){
			online = ajaxRequest2.responseText;
			olarray = online.split("|");
			var1 = "<b>";
			var2 = olarray[1];
			var3 = " User(s) Online</b><br><hr><br>";
			var4 = olarray[0];
			onlinecontent = var1 + var2 + var3 + var4;
			olbox = document.getElementById("onlinebox").innerHTML = onlinecontent;
		}
	}
	ajaxRequest2.open("POST", "chat_online.php", true);
	ajaxRequest2.send(null); 
	setTimeout("process_online()",10000);
}


function loadXMLDoc(url,query_string,callback) {
	xml_obj = false;
    if(window.XMLHttpRequest) {
    	try {
			xml_obj = new XMLHttpRequest();
        } catch(e) {
			xml_obj = false;
        }
    } else if(window.ActiveXObject) {
       	try {
        	xml_obj = new ActiveXObject("Msxml2.XMLHTTP");
      	} catch(e) {
        	try {
          		xml_obj = new ActiveXObject("Microsoft.XMLHTTP");
        	} catch(e) {
          		xml_obj = false;
        	}
		}
    }
	if(xml_obj) {
		xml_obj.onreadystatechange = callback;
		xml_obj.open("POST", url, true);
		xml_obj.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
		xml_obj.send(query_string);
	}
	else{
		alert("Failed to create XMLHttpRequest!");
	}
}

function messagesRetrieved(){
	if (xml_obj.readyState == 4){
		if (xml_obj.status == 200 && xml_obj.responseXML){
			document.getElementById("chat_area").innerHTML += xml_obj.responseText;
		}
		
	}
}
 
function get_xml(){
	loadXMLDoc("request.php","action=get_xml",messagesRetrieved);
	setTimeout("get_xml()",5000);
}

function send_xml(){
        u = user;
	b = document.send_form.mbody.value;
	qs = "action=add_post&from="+escape(u)+"&post="+escape(b);
	loadXMLDoc("request.php",qs,messagesRetrieved);
        messagebox = document.send_form.mbody;
        messagebox.value = '';
}