var http = null;

function create_ajax() {
    if (window.XMLHttpRequest) {
      http = new XMLHttpRequest();
    } else if (window.ActiveXObject) {
      try {
    	http = new ActiveXObject("Msxml2.XMLHTTP");
      } catch (e) {
        try {
    	  http = new ActiveXObject("Microsoft.XMLHTTP");
        } catch (e) {}
      }
    }
}

function iecompat () {
	var i;
	if (navigator.appName.indexOf("Explorer") != -1) {
    		for (i=1;i<16;i++) {
				document.getElementById('nx'+i).style.width = '100%';
			}
			//document.getElementById('fussabst').style.height = '3px';
			//document.getElementById('fussblock').style.height = '3px';
	}
}

function FensterOeffnen (Adresse, sollb, sollh) {
	var br = screen.width;
	var he = screen.height;
	br=(br-sollb)/2;
	he=(he-sollh)/2;
	Fenster1 = window.open(Adresse, "kleinesfenster", "width="+sollb+",height="+sollh+",left="+br+",top="+he);
	Fenster1.focus();
}

function FensterOeffnenB (Adresse, sollb, sollh) {
	var br = screen.width;
	var he = screen.height;
	br=(br-sollb)/2;
	he=(he-sollh)/2;
	Fenster2 = window.open(Adresse, "kleinesfenster", "width="+sollb+",height="+sollh+",left="+br+",top="+he+",scrollbars=yes");
	Fenster2.focus();
}

function favorit (titel) {
	var beschriftung;
	var browser = navigator.userAgent.toLowerCase();
	if (browser.indexOf("msie") != -1) {
		beschriftung = 'Schulstoff.net - ' + titel;
		window.external.addFavorite(location.href,beschriftung);
	} else {
		window.sidebar.addPanel(titel, location.href, '');
	}
}

function wadd () {
	location.href="http://www.mister-wong.de/index.php?action=addurl&bm_url="+encodeURIComponent(location.href)+"&bm_description="+encodeURIComponent(document.title);
	return false;
}

function drucken (DruckURL,Druckbar) {
	if (Druckbar != 1) {
		alert ('Von dieser Seite kann aus technischen Gründen leider keine gesonderte Druckansicht erzeugt werden.');
	} else {
		FensterOeffnenB(DruckURL,400,350);
	}
}

function zufzitat () {
    create_ajax();
    if(http != null) {
        http.abort();
        http.open("GET", "zufallszitat.php", true);
        http.onreadystatechange = zufzitatv;
        var success = true;
        try {http.send(null);}
        catch (e) {success = false;}
        if(success) return;
    }
}

function zufzitatv () {
    if (!http || http.readyState != 4) return;
    var answer=http.responseText;
    document.getElementById('zufzittext').innerHTML = answer;
}

function JSLVA (id) {
	var br = screen.width;
	var he = screen.height;
	var basis = 'http://www.schulstoff.net/';
	document.write('<img src="'+basis+'fnc/jslva-'+id+'-'+br+'-'+he+'.png" alt="">');
}

function lpage () {
	iecompat();
	zufzitat();
}