/* most simple ajax chat script (www.linuxuser.at) (GPLv2) */
var nick_maxlength=1000;
var http_request=false;
var http_request2=false;
var intUpdate;
var chatnick = document.getElementById("chatnick");
var chatmsg = document.getElementById("chatmsg");
var chatwindow = document.getElementById("chatwindow");



/* http_request for writing */
function ajax_request(url) {
	http_request=false;
	if(window.XMLHttpRequest) {
		http_request=new XMLHttpRequest();
		if(http_request.overrideMimeType) {
			http_request.overrideMimeType('text/xml');
		}
	} else if(window.ActiveXObject) {
		try {
			http_request=new ActiveXObject("Msxml2.XMLHTTP");
		} catch(e) { 
			try {
				http_request=new ActiveXObject("Microsoft.XMLHTTP");
			} catch(e) {}
		}
	}
	if(!http_request) {
		alert('Giving up :( Cannot create an XMLHTTP instance');
		return false;
	}
	http_request.onreadystatechange=alertContents;
	http_request.open('GET',url,true);
	http_request.send(null);
}

function alertContents() {
	if(http_request.readyState==4) {
		if(http_request.status==200){ 
			rec_response(http_request.responseText);
		} else {}
	}
}

/* http_request for reading */
function ajax_request2(url) {
	http_request2=false;
	if(window.XMLHttpRequest) {
		http_request2=new XMLHttpRequest();
		if(http_request2.overrideMimeType) {
			http_request2.overrideMimeType('text/xml');
		}
	} else if(window.ActiveXObject) {
		try{http_request2=new ActiveXObject("Msxml2.XMLHTTP");}
		catch(e) {
			try {http_request2=new ActiveXObject("Microsoft.XMLHTTP");}
			catch(e){}
		}
	}
	if(!http_request2) {
		alert('Giving up :( Cannot create an XMLHTTP instance');
		return false;
	}
	http_request2.onreadystatechange=alertContents2;
	http_request2.open('GET',url,true);
	http_request2.send(null);
}

function alertContents2() {
	if(http_request2.readyState==4) {
		if(http_request2.status==200) {
			rec_chatcontent(http_request2.responseText);
		} else{}
	}
}

/* chat stuff */
var show_newmsg_on_bottom=0; 	/* set to 0 to let new msg´s appear on top */
var waittime=3000;		/* time between chat refreshes (ms) */

intUpdate=window.setTimeout("read_cont();", waittime);
chatwindow.innerHTML = "<em>[System Mesaji]: Son mesajlar taraniyor...</em>";

function read_cont() {
	zeit = new Date();
	ms = (zeit.getHours() * 24 * 60 * 1000) + (zeit.getMinutes() * 60 * 1000) + (zeit.getSeconds() * 1000) + zeit.getMilliseconds();
	ajax_request2("http://www.sohbetforum.com/st/chat.txt?x=" + ms);
}

function display_msg(msg1) {
	chatwindow.innerHTML = msg1.substr(0,msg1.length - 1);
}

function keyup(arg1) {
	if (arg1 == 13) submit_msg();
}

function submit_msg() {
	clearTimeout(intUpdate);
	if (chatnick.value == "") {
	
		if (check === null) return 0; 
		if (check == "") check="..."; 
		chatnick.value=check; 
	} 
	if (chatnick.value.length > nick_maxlength) chatnick.value=chatnick.value.substring(0,nick_maxlength);
	write_msg(chatmsg.value,chatnick.value); 
	chatmsg.value=""; 
	intUpdate=window.setTimeout("read_cont();", waittime);
}

function write_msg(msg1,nick1) {
	ajax_request("http://www.sohbetforum.com/st/w.php?m=" + escape(msg1) + "&n=" + escape(nick1));
}

function rec_response(str1) { }

function rec_chatcontent(cont1) { 
	if (cont1 != "") { 
		out1 = unescape(cont1); 
		if (show_newmsg_on_bottom == 0) { 
			out1 = ""; 
			while (cont1.indexOf("\n") > -1) { 
				out1 = cont1.substr(0, cont1.indexOf("\n")) + "\n" + out1; 
				cont1 = cont1.substr(cont1.indexOf("\n") + 1); 
				out1 = unescape(out1); 
			}
		}
		if (chatwindow.innerHTML != out1) { display_msg(out1); } 
		intUpdate=window.setTimeout("read_cont()", waittime); 
	} 
}