function setActiveStyleSheet(title) {
     if (!document.getElementsByTagName) return;
     var i,a;

    for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
	if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
	    a.disabled = true;
	    if(a.getAttribute("title") == title) a.disabled = false;
	}
    }
    if (document.recalc) {
	document.recalc(true);
    }
}

function getActiveStyleSheet() {
    var i, a;
    for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
	if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled) return a.getAttribute("title");
    }
    return null;
}

function getPreferredStyleSheet() {
    var i, a;
    for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
	if(a.getAttribute("rel").indexOf("style") != -1
	   && a.getAttribute("rel").indexOf("alt") == -1
	   && a.getAttribute("title")
	   ) return a.getAttribute("title");
    }
    return null;
}

function createCookie(name,value,days) {
    if (days) {
	var date = new Date();
	date.setTime(date.getTime()+(days*24*60*60*1000));
	var expires = "; expires="+date.toGMTString();
    }
    else expires = "";
    document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
    var nameEQ = name + "=";
    var ca = document.cookie.split(';');
    for(var i=0;i < ca.length;i++) {
	var c = ca[i];
	while (c.charAt(0)==' ') c = c.substring(1,c.length);
	if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
    }
    return null;
}
function readCookie2(name) {
    return 12;
}
function setFontSize(size) {
    document.getElementsByTagName('body')[0].style.fontSize = size + 'px';
}

window.onload = function(e) {
    var cookie = readCookie(cookieName);
    if (cookie){
	var title = cookie;
    } else {
	var title = getPreferredStyleSheet();
    }
    setActiveStyleSheet(title);

    var cookie = readCookie2(cookieName2);
    if (cookie){
	fSize = cookie;
    } else {
	fSize = 12;
    }
    setFontSize(fSize);

}

window.onunload = function(e) {
    var title = getActiveStyleSheet();
    createCookie(cookieName, title, 365);
    createCookie(cookieName2, fSize, 365);
}

var cookieName = 'aw7Style';
var cookieName2 = 'aw7Size';
var cookie = readCookie(cookieName);
var title = cookie ? cookie : getPreferredStyleSheet();
setActiveStyleSheet('contrastNo');
var fSize = 12;
var fontControlOn = 'Schrift anpassen';
var fontControlOff = 'ausblenden';


addLoadEvent(function() {
	var el = document.getElementById('config');
	el.innerHTML = fontControlOn;
	if (el) {
	    el.onclick = function() {
		var contrast = document.getElementById('contrast');
		if (contrast) {
		    if (contrast.className == '') {
			this.innerHTML = fontControlOn;
			contrast.className = 'blind';

		    } else {
			this.innerHTML = fontControlOff;
			contrast.className = '';
		    }
		}
		return false;
	    };
	}
	var farben = new Array('SW','WS','BG','GB','GS','RB','No');
	for (var i in farben) {
	    var el = document.getElementById('contrast'+farben[i]);
	    if (el) {
		el.onclick = function() {
		    setActiveStyleSheet(this.id);
		    return false;
		}
	    }
	}
	var el = document.getElementById('largerSize');
	if (el) {
	    el.onclick = function() {
		fSize +=2;
		setFontSize(fSize);
		return false;
	    }
	}
	var el = document.getElementById('smallerSize');
	if (el) {
	    el.onclick = function() {
		fSize -=2;
		setFontSize(fSize);
		return false;
	    }
	}

    });