var ablauf = new Date();
var infuenfTagen = ablauf.getTime() + (5 * 24 * 60 * 60 * 1000);
ablauf.setTime(infuenfTagen);

function eraseCookie(name) {
	document.cookie = name + "=; path=/; domain=http://www.gronau.de; expires=Thu, 01-Jan-70 00:00:01 GMT";
	document.cookie = name + "=; path=/; domain=www.gronau.de; expires=Thu, 01-Jan-70 00:00:01 GMT";
}

function onOff(){
	eraseCookie('knavi');
	if(document.getElementById("navigatorMenue").style.display == "block"){
		document.getElementById("navigatorMenue").style.display = "none";
		document.getElementById("btNavigator").src = "fileadmin/swdu/template/images/pfeil_unten.gif";
		document.cookie = "knavi=zu; expires=" + ablauf.toGMTString();
	}else{
		document.getElementById("navigatorMenue").style.display = "block";
		document.getElementById("btNavigator").src = "fileadmin/swdu/template/images/swdu_navigator.gif";
		document.cookie = "knavi=auf; expires=" + ablauf.toGMTString();
	}
}

function leseCookie(){
	if(document.cookie.substr( document.cookie.indexOf("knavi="), 9) == "knavi=auf"){
		document.getElementById("navigatorMenue").style.display = "block";
		document.getElementById("btNavigator").src = "fileadmin/swdu/template/images/swdu_navigator.gif";
	}
	if(document.cookie.substr( document.cookie.indexOf("knavi="), 8) == "knavi=zu"){
		document.getElementById("navigatorMenue").style.display = "none";
		document.getElementById("btNavigator").src = "fileadmin/swdu/template/images/pfeil_unten.gif";
	}
}

function kontrast(k){
	eraseCookie('kontrast');
	document.cookie = "kontrast=" + k + "; expires=" + ablauf.toGMTString();	
	adresse = document.location.href;
	document.location.href = adresse;
}

if(document.cookie.substr( document.cookie.indexOf("kontrast="), 10) == "kontrast=1"){
	document.write("<link rel='stylesheet' type='text/css' href='fileadmin/gronau/css/kontrast_dunkel.css' />");	
}