var sendReq = getXmlHttpRequestObject();
    var receiveReq = getXmlHttpRequestObject();
    var lastMessage = 0;
    var mTimer;	

	function startChat() 
	{
	    getChatText();
	}

	function getXmlHttpRequestObject() 
	{
		if (window.XMLHttpRequest) 
		{
			return new XMLHttpRequest();
		} 
		else if(window.ActiveXObject) 
		{
			return new ActiveXObject("Microsoft.XMLHTTP");
		} 
		else 
		{
			document.getElementById('p_status').innerHTML = 'Status: Cound not create XmlHttpRequest Object.  Consider upgrading your browser.';
		}
	}

	function getChatText() 
	{
		if (receiveReq.readyState == 4 || receiveReq.readyState == 0) 
		{
		    if (bIsPathTranslated)
		    {
		        var sUrlAdd = 'index.php/public/check-im/';
		    } else 
		    {
		        sUrlAdd = 'index.php?' + sGetPathVar + '=' + '/public/check-im/';
		    }
			receiveReq.open("GET", SciptHome+sUrlAdd, true);
			receiveReq.onreadystatechange = handleReceiveChat;
			receiveReq.send(null);
		}
	}

	function handleReceiveChat() 
	{
		if (receiveReq.readyState == 4 || receiveReq.readyState == 0) 
		{
			var chat_div = document.getElementById('div_chat');
			var xmldoc = receiveReq.responseXML;
			var message_nodes = xmldoc.getElementsByTagName("message"); 
			var n_messages = message_nodes.length;
			for (i = 0; i < n_messages; i++) 
			{
				var user_node = message_nodes[i].getElementsByTagName("user");
				var time_node = message_nodes[i].getElementsByTagName("time");
				if(user_node[0] != null)
				{
					chat_div.innerHTML = '' +user_node[0].firstChild.nodeValue + '';
					chat_div.scrollTop = chat_div.scrollHeight;
				}
				else
				    chat_div.innerHTML = '';
				
				lastMessage = (message_nodes[i].getAttribute('id')) ? (message_nodes[i].getAttribute('id')) : 0;
			}
			mTimer = setTimeout('getChatText();',10000);
		}
	}