var http_request = false;
	var url = "online.data.php";
	var responseXML;
	var MsgDiv;
	var ReadNum = "";
	var kisschat = "";

    function SetRequest() 
	{
		http_request.open('GET', url, true);
		http_request.onreadystatechange = GetContent;
		http_request.send(null);
	}
	
    function GetContent()
	{
        if (http_request.readyState == 4) 
		{
            if (http_request.status == 200)
			{
				responseXML = http_request.responseXML;
				GetUser();
            }
			else 
			{
                //alert('error : can not get content');
				setTimeout('SetRequest()',500);
            }
        }
    }
	
	function GetUser()
	{
		kisschat = responseXML.getElementsByTagName("KISSCHAT"); 
		if(kisschat.length)
		{
			var results = responseXML.getElementsByTagName("USER"); 
			var HTML_Content = "";
			for (var i= 0 ;i < results.length ; i++)
			{ 
				node = results[i].childNodes[0].firstChild;
				SN = node?node.nodeValue:"";
				node = results[i].childNodes[1].firstChild;
				ID = node?node.nodeValue:"";
				node = results[i].childNodes[2].firstChild;
				Color = node?node.nodeValue:"";
				if(ID=="") { ID = "guest"; Color = "888888"; }
				HTML_Content += "<span style='color:#" + Color + ";'>" + ID + "</span><BR>";
			}
			if(HTML_Content)
			{
				document.getElementById("CONTENT").innerHTML = HTML_Content;
			}
		}
		GetMessage();
	}

	function GetMessage()
	{
		if(kisschat.length)
		{
			var results = responseXML.getElementsByTagName("MESSAGE"); 
			var SNBASE = "";
			var HTML_Content = "";
			MsgDiv = document.getElementById("MESSAGE");
			for (var i= results.length-1 ;i >= 0  ; i--)
			{ 
				node = results[i].childNodes[0].firstChild;
				SN = node?node.nodeValue:"";
				SNBASE += ',' + SN;
				if((ReadNum)&&(SN)&&(ReadNum*1<SN*1))
				{
					node = results[i].childNodes[1].firstChild;
					UserSN = node?node.nodeValue:"";
					node = results[i].childNodes[2].firstChild;
					UserMSG = node?node.nodeValue:"";
					node = results[i].childNodes[3].firstChild;
					ID = node?node.nodeValue:"";
					node = results[i].childNodes[4].firstChild;
					IP = node?node.nodeValue:"";
					node = results[i].childNodes[5].firstChild;
					Color = node?node.nodeValue:"";
					node = results[i].childNodes[6].firstChild;
					PostDT = node?node.nodeValue:"";

					if(UserSN=="ALERT")
					{ 
						TmpID = UserMSG.split(",");
						if(TmpID.length==1)
						{ HTML_Content = "<li><span style='color:#"+Color+";'>"+TmpID[0]+"</span><span style='color:#555555;'> 加入囉 ~</span><br><table border=0><tr><td height=5></td></tr></table>"; }
						else
						{ HTML_Content = "<li><span style='color:#"+Color+";'>"+TmpID[0]+"</span><span style='color:#555555;'> 改名成為 </span><span style='color:#"+Color+";'>"+TmpID[1]+"</span><br><table border=0><tr><td height=5></td></tr></table>"; }
					}
					else
					{ HTML_Content = "<span style='color:"+Color+"'><b>"+ID+" 說 :</b><BR>&nbsp; "+UserMSG+"</span><br><table border=0><tr><td height=5></td></tr></table>"; }
					
					MsgDiv.innerHTML += HTML_Content;
				}
			}
			if(SN) { ReadNum = SN; }
			if(HTML_Content)
			{
				MsgDiv.scrollTop = MsgDiv.scrollHeight;
				MsgDiv.scrollTop = MsgDiv.scrollHeight;
			}
		}
		setTimeout('SetRequest()',500);
	}

	function keyinevent(e)
	{
		if(event.keyCode==13)
		{
			check_form();
		}
	}

	window.onload = function()
	{
		MakeRequest();
		SetRequest();
		document.getElementById("USERID").onkeydown = keyinevent;
		document.getElementById("USERMSG").onkeydown = keyinevent;
	};
	
	function check_form()
	{
		if(document.getElementById("USERID").value=="")
		{ alert("發言前 , 要先填寫暱稱喔 ~"); }
		else if(document.getElementById("USERMSG").value=="")
		{ alert("請寫下您想發送的訊息 !"); }
		else
		{ Chat_User.submit(); }
	}