function setCookie(whichName,whichValue,daysUntilExpiration) {
	if(daysUntilExpiration == null) daysUntilExpiration=30;
	// 30 days is default value
	var cookieExpDate = new Date((new Date()).getTime() + (1000*60*60*24*daysUntilExpiration)); 
	var cookieContent = whichName + '=' + whichValue + '; expires=' + cookieExpDate.toGMTString()+';';
	document.cookie = cookieContent;
}

function getCookie(whichName){
	var cookieContent = document.cookie;
	var pos = cookieContent.indexOf(whichName);
	var start = pos + whichName.length + 1;
	var end = cookieContent.indexOf(";",start);
	if(end == -1) end = cookieContent.length;
	var whichValue = cookieContent.substring(start,end);
	return whichValue;
}

function deleteCookie(whichName,whichValue){
	var cookieContent = whichName + '=' + whichValue + '; expires=expires=Thu, 01-Jan-70 00:00:01 GMT;';
	document.cookie = cookieContent;
}

// function getCookie(name) {
//    var i=0;  //Suchposition im Cookie
//    var suche = name + "=";
//    while (i<document.cookie.length) {
//       if (document.cookie.substring(i, i + suche.length) == suche) {
//          var ende = document.cookie.indexOf(";", i + suche.length);
//          ende = (ende > -1) ? ende : document.cookie.length;
//          var cook = document.cookie.substring(i + suche.length, ende);
//          return cook;
//          //return unescape(cook);
//       }
//       i++;
//    }
//    return "";
// }