// AJAX
var http_request = false;

function createRequest(url, contentLayer, loadingLayer) {

	document.getElementById(loadingLayer).style.visibility = 'visible';
	document.getElementById(loadingLayer).style.display = 'block';

	http_request = false;

	if (window.XMLHttpRequest) { // Mozilla, Safari,...
		http_request = new XMLHttpRequest();
		if (http_request.overrideMimeType) {
			http_request.overrideMimeType('text/xml');
		}
	} else if (window.ActiveXObject) { // IE
		try {
			http_request = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try {
				http_request = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e) {}
		}
	}

	if (!http_request) {
		alert('Cannot create an XMLHTTP instance');
		document.getElementById(loadingLayer).style.visibility = 'hidden';
		document.getElementById(loadingLayer).style.display = 'none';
		return false;
	}

	http_request.onreadystatechange = function () { writeContent(contentLayer, loadingLayer); };
	http_request.open('GET', url, true);
	http_request.send(null);

	return true;
}

function writeContent (contentLayer, loadingLayer) {
	if (http_request.readyState == 4) {
		if (http_request.status == 200) {
			var contentDIV = document.getElementById(contentLayer);
			contentDIV.innerHTML = http_request.responseText;
		} else {
			alert('There was a problem with the request.');
		}
		document.getElementById(loadingLayer).style.visibility = 'hidden';
		document.getElementById(loadingLayer).style.display = 'none';
	}
}

// Rating

function rating_on (num) {
	for (var i = 1; i<=num; i++) {
		document.getElementById('rating_'+i).src = '/images/rating_1.png';
	}
}

function rating_off (num) {
	for (var i = 1; i<=num; i++) {
		document.getElementById('rating_'+i).src = '/images/rating_0.png';
	}
}

function do_popup (url, name, option) {
	window.open(url, name, option);

	return false;
}

function do_history_back () {
	history.go(-1);
	return false;
}

// Alles schwarz weiß machen
function blacknwhite () {
	var html_tags = new Array('body', 'h1', 'h2', 'h3', 'h4', 'span', 'p', 'div', 'ul', 'li', 'a');

	for (var tag_name in html_tags) {
		var loop = true;
		var counter = 0;
		while (loop) {
			if (document.getElementsByTagName(html_tags[tag_name])[counter]) {
				document.getElementsByTagName(html_tags[tag_name])[counter].style.color = '#000';
				document.getElementsByTagName(html_tags[tag_name])[counter].style.border = '#000';
				document.getElementsByTagName(html_tags[tag_name])[counter].style.background = '#fff';
				counter++;
			} else {
				loop = false;
				counter = 0;
			}
		}
	}
}

/* Fuer das Content Modul */

function change_tab(active_tab) {
	var i = 1;
	while (document.getElementById('tab_'+i)) {
		if ('tab_'+i == active_tab) {
			document.getElementById('tab_'+i).className = "active_tab";
			document.getElementById('tab_list_'+i).style.visibility = "visible";
			document.getElementById('tab_list_'+i).style.display = "block";
		} else {
			document.getElementById('tab_'+i).className = "tab";
			document.getElementById('tab_list_'+i).style.visibility = "hidden";
			document.getElementById('tab_list_'+i).style.display = "none";
		}
		i++;
	}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
	var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
	if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
	d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}