function createXMLHttpRequest()
	{
		var ua; 

		if(window.XMLHttpRequest)
			{ 
				try
					{ 
						ua = new XMLHttpRequest();
					}
				catch(e)
					{
						ua = false;
					} 
			} else if(window.ActiveXObject) {
				try
					{
						ua = new ActiveXObject('Microsoft.XMLHTTP'); 
					}
				catch(e)
					{
						ua = false;
					}
			} 

		return ua; 
	}
var request = createXMLHttpRequest();

function login(){
//	xmlget = getXMLHTTP();
	xmlget = request;
	//xmlget.overrideMimeType('text/xml; charset=ISO-8859-1');
	xmlget.open("GET", "login.php?call="+escape(document.getElementById('call').value)+"&passwort="+escape(document.getElementById('passwort').value)+"&do=login");
//	xmlget.open("GET", "login.php?do="+escape(document.getElementById('login_button').value)+"&call=DG4DKF&passwort=drezdmen");
//	xmlget.open("GET", "login.php?call=DG4DKF&passwort=drezdmen");
	xmlget.onreadystatechange = function(){
        if (xmlget.readyState == 4) {
             var answer = xmlget.responseText;
                document.getElementById("login").innerHTML = answer;
		}
	}
	xmlget.send(null);
	return true;
}

function shout(){
	document.getElementById("sb_send").value = "Sende...";
	document.getElementById("sb_send").disabled = true; 
	xmlget = request;
	// 	xmlget.overrideMimeType('text/xml; charset=ISO-8859-1');   //Funktioniert nur im Mozilla, ist hier auch nicht nötig
	xmlget.open("GET", "modules/sidebar/shoutbox.php?modules2=shoutbox&name="+escape(document.getElementById('sb_name').value)+"&text="+escape(document.getElementById('sb_text').value));
	xmlget.onreadystatechange = function(){
        var answer = xmlget.responseText;
		if ( xmlget.readyState == 4 ) {
				document.getElementById("sb_send").value = "Senden";
				document.getElementById("sb_send").disabled = false; 
				document.getElementById("sb_text").value = "";
                document.getElementById("shoutbox").innerHTML = answer;
		}
	}
	xmlget.send(null);
	return true;
}


function onload() {
	fetch();
	view_onlineusers();
}

//Fetch entries of the shoutbox
function fetch(){
	xmlget = request;
	xmlget.open("GET", "modules/sidebar/shoutbox.php");
	xmlget.onreadystatechange = function(){
        if (xmlget.readyState == 4) {
             var answer = xmlget.responseText;
              if(document.getElementById("shoutbox").innerHTML != answer){
                document.getElementById("shoutbox").innerHTML = answer;
              }
		}
	}
	xmlget.send(null);
	return true;
}

//Fetch onlineusers
function view_onlineusers(){
	xmlget = request;
	xmlget.open("GET", "modules/sidebar/view_onlineusers_ajax.php");
	xmlget.onreadystatechange = function(){
        if (xmlget.readyState == 4) {
             var answer = xmlget.responseText;
              if(document.getElementById("onlineusers").innerHTML != answer){
                document.getElementById("onlineusers").innerHTML = answer;
              }
		}
	}
	xmlget.send(null);
//	return true;
}

function fetch_last_action(offset, loadmore, user_id){
	xmlget = request;
	var link = "modules/last_action.php?loadmore="+loadmore+"&offset="+offset;
	if(user_id != "") link += "&user_id="+user_id;
	var moreitems = "moreitems_"+loadmore;
	var moreitems_table = "moreitems_"+loadmore+"_table";
	table_old = document.getElementById(moreitems_table).innerHTML;
	document.getElementById(moreitems).innerHTML += '<tr><td><img src="./gfx/ladekreis.gif" alt="Lade..." title="Lade..."></td></tr>';
	
	xmlget.open("GET", link);
	xmlget.onreadystatechange = function(){
        if (xmlget.readyState == 4) {
             var answer = xmlget.responseText;
              if(document.getElementById(moreitems_table).innerHTML != answer){
                document.getElementById(moreitems_table).innerHTML = table_old + answer;
                document.getElementById(moreitems).style.display = 'none';
                document.getElementById(moreitems).id = "tmp";
              }
		}
	}
	xmlget.send(null);
	//return true;
}

function validateEmail(email){
	//if(email=="") email=document.getElementById("email").value;
	email="dkf@gmx.net";
	xmlget = request;
	var link = "modules/validateEmail.php?email="+email;
	var link = "modules/validateEmail.php?email=dkf@dsgmx.net";
	xmlget.open("GET", link);
	xmlget.onreadystatechange = function(){
        if (xmlget.readyState == 4) {
             var answer = xmlget.responseText;
			 document.getElementById("email_error").innerHTML = answer;
			 document.getElementById("email_error").innerHTML += 'bla';
		}
	}
	xmlget.send(null);
	return true;
}

function toggle(url,done,id){
	xmlget = request;
	xmlget.open("GET", "./modules/"+url+".php?toggle=1&done="+done+"&id="+id+"&url="+url);
	xmlget.onreadystatechange = function(){
        if (xmlget.readyState == 4) {
             var answer = xmlget.responseText;
              if(document.getElementById("toggle_"+id).innerHTML != answer){
                document.getElementById("toggle_"+id).innerHTML = answer;
              }
		}
	}
	xmlget.send(null);
//	return true;
}

//Fetch onlineusers
function fetch_content(modules, options){
    document.getElementById("content").innerHTML = "Seite wird geladen...<br><br><img src=\"/gfx/ladekreis.gif\" border=\"0\"><br><br><a href=\"/?modules="+modules+"&"+options+"\">Falls die Seite nicht geladen werden kann, klicke bitte hier.</a>";
	xmlget = request;
	xmlget.open("GET", "modules/"+modules+".php?ajax=on&"+options);
	xmlget.onreadystatechange = function(){
        if (xmlget.readyState == 4) {
             var answer = xmlget.responseText;
             document.getElementById("content").innerHTML = answer;
		}
	}
	xmlget.send(null);
	
	document.getElementById("nav_aktivitaeten").style.display='none';
	document.getElementById("nav_technik").style.display='none';

	if(modules=='aktivitaeten') document.getElementById("nav_aktivitaeten").style.display='block';
	if(modules=='technik') document.getElementById("nav_technik").style.display='block';
//	return true;
}

function clear_value(id, value_old, value_new){
	if(document.getElementById(id).value == value_old){
		document.getElementById(id).value = value_new;
	}
	
//	return true;
}


function expand_comment(feedback_id){
	document.getElementById("feedback_comments_"+feedback_id).style.display = 'block';
//	return true;
}

function send_comment(url,id){
	text=document.getElementById("comment_"+id).value.replace(/\n/g,'<br />');
//    document.getElementById("test").innerHTML = "Lala"+id;

	xmlget = request;
	xmlget.open("GET", "./modules/"+url+".php?comment="+text+"&feedback_id="+id);
	xmlget.onreadystatechange = function(){
        if (xmlget.readyState == 4) {
             var answer = xmlget.responseText;
            document.getElementById("new_comment_"+id).innerHTML = "<br />Gespeichert.";
            document.getElementById("comments_"+id).innerHTML = answer;
		}
	}
	xmlget.send(null);
	return true;
}



//window.onload=fetch();
window.setInterval("fetch();", 10000);
//setInterval("view_onlineusers();", 5000);