function shownhide(showit,hideit){
  showobj = document.getElementById(showit);
  hideobj = document.getElementById(hideit);
  showobj.style.display='';
  hideobj.style.display='none';  
}			

function showchat(){
  showobj = document.getElementById('chatmax');
  hideobj = document.getElementById('chatmin');
  showobj.style.width="50em";
  showobj.style.display='';
  hideobj.style.display='none';
  setCookie('chatshow','1',30);
}

function hidechat(){
  showobj = document.getElementById('chatmin');
  hideobj = document.getElementById('chatmax');
  showobj.style.display='';
  hideobj.style.display='none'; 
  hideobj.style.width="10em";
  setCookie('chatshow','0',30);
}

/****************************************************************
 * Most Simple Ajax Chat Script (www.linuxuser.at)		*
 * Version: 3.1							*
 * 								*
 * Author: Chris (chris[at]linuxuser.at)			*
 * Contributors: Derek, BlueScreenJunky (http://forums.linuxuser.at/viewtopic.php?f=6&t=17)
 *								*
 * Licence: GPLv2						*
 ****************************************************************/
 
/* Settings you might want to define */
	var waittime=1800;		

/* Internal Variables & Stuff */
	//chatmsg.focus()
	//document.getElementById("chatwindow").innerHTML = "loading...";

	var xmlhttp = false;
	var xmlhttp2 = false;
	var nick = "38.107.191.113";
	var chatpath = "/";
	var chatfile = chatpath+'chat.txt';


/* Request for Reading the Chat Content */
function ajax_read(url) {
	if(window.XMLHttpRequest){
		xmlhttp=new XMLHttpRequest();
		if(xmlhttp.overrideMimeType){
			xmlhttp.overrideMimeType('text/xml');
		}
	} else if(window.ActiveXObject){
		try{
			xmlhttp=new ActiveXObject("Msxml2.XMLHTTP");
		} catch(e) {
			try{
				xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
			} catch(e){
			}
		}
	}

	if(!xmlhttp) {
		alert('Giving up :( Cannot create an XMLHTTP instance');
		return false;
	}

	xmlhttp.onreadystatechange = function() {
	if (xmlhttp.readyState==4) {
		var chattxt = xmlhttp.responseText;
		chattxt = chattxt.replace(/\t/g, " | ");
		chattxt = chattxt.replace(/\n/g, "<br />\n");
		document.getElementById("chatwindow").innerHTML = chattxt.replace(/\t/g, " | ")

		zeit = new Date(); 
		ms = (zeit.getHours() * 24 * 60 * 1000) + (zeit.getMinutes() * 60 * 1000) + (zeit.getSeconds() * 1000) + zeit.getMilliseconds(); 
		intUpdate = setTimeout("ajax_read(chatfile+'?x=" + ms + "')", waittime)
		}
	}

	xmlhttp.open('GET',url,true);
	xmlhttp.send(null);
}

/* Request for Writing the Message */
function ajax_write(url){
	if(window.XMLHttpRequest){
		xmlhttp2=new XMLHttpRequest();
		if(xmlhttp2.overrideMimeType){
			xmlhttp2.overrideMimeType('text/xml');
		}
	} else if(window.ActiveXObject){
		try{
			xmlhttp2=new ActiveXObject("Msxml2.XMLHTTP");
		} catch(e) {
			try{
				xmlhttp2=new ActiveXObject("Microsoft.XMLHTTP");
			} catch(e){
			}
		}
	}

	if(!xmlhttp2) {
		alert('Giving up :( Cannot create an XMLHTTP instance');
		return false;
	}

	xmlhttp2.open('GET',url,true);
	xmlhttp2.send(null);
}

/* Submit the Message */
function submit_msg(){
	msg = document.getElementById("chatmsg").value;

	if (nick == "") { 
		check = prompt("please enter username:"); 
		if (check === null) return 0; 
		if (check == "") check = "anonymous"; 
		document.getElementById("chatnick").value = check;
		nick = check;
	} 

	document.getElementById("chatmsg").value = "";
	ajax_write(chatpath+"chat.php?m=" + msg + "&n=" + nick);
}

/* Check if Enter is pressed */
function keyup(arg1) { 
	if (arg1 == 13) submit_msg(); 
}

/**** cookie functions ****/
function setCookie(c_name,value,expiredays){
  var exdate=new Date();
  exdate.setDate(exdate.getDate()+expiredays);
  document.cookie=c_name+ "=" +escape(value)+
  ((expiredays==null) ? "" : ";expires="+exdate.toGMTString());
}

function getCookie(c_name){
  if (document.cookie.length>0)
    {
    c_start=document.cookie.indexOf(c_name + "=");
    if (c_start!=-1)
      { 
      c_start=c_start + c_name.length+1; 
      c_end=document.cookie.indexOf(";",c_start);
      if (c_end==-1) c_end=document.cookie.length;
      return unescape(document.cookie.substring(c_start,c_end));
      } 
    }
  return "";
}

function addchat(target){
  var show = getCookie('chatshow');
  
  //alert("loading chat - cookie is " + show);

  if(show == 1){
    var cmin = "none"
    var cmax = "";
  } else {
    var cmin = ""
    var cmax = "none";
  }
  var myElement = document.createElement('div');
  myElement.style.position="fixed";
  myElement.style.bottom="10px";
  myElement.style.right="10px";
  myElement.style.zIndex="100";
  myElement.style.border="thin solid black";
  myElement.style.backgroundColor="white";
  myElement.style.padding="5px";
  myElement.id="chatwrap";
  
  //myElement.innerHTML = '<div id="chatmin" style="display:none">';
  var sub = document.createElement('div');
  sub.id="chatmin";
  sub.style.display=cmin;
  sub.innerHTML +='<button id="chatshowbtn" onclick="showchat();" style="cursor:pointer;border:1px solid gray;">show chat</button><br />';	
  myElement.appendChild(sub);
  sub = document.createElement('div');
  sub.id="chatmax";
  sub.style.display=cmax;
  sub.innerHTML ='<button id="chathidebtn" onclick="hidechat();" style="cursor:pointer;border:1px solid gray;">hide chat</button><br />';	
  sub.innerHTML +='<p id="chatwindow">Loading... </p>';
	
  sub.innerHTML +='<input id="chatmsg" type="text" size="60" maxlength="80"  onkeyup="keyup(event.keyCode);">';
  sub.innerHTML +='<input type="button" value="add" onclick="submit_msg();" style="cursor:pointer;border:1px solid gray;">';
  myElement.appendChild(sub);
  target.appendChild(myElement);
}//function


bodary = document.getElementsByTagName("body");
thebody = bodary[0];
thebody.load=addchat(thebody);


/* Start the Requests! ;) */
var intUpdate = setTimeout("ajax_read(chatfile)", waittime);