function now(inc) {
	date=new Date();
	if (inc) {
		date.setTime(date.getTime()+inc*1000);
	}
	return date;
}

function setCookie(name,value,expire,path) {
	s=name+"="+value;
	if (expire) s+="; expires="+expire.toGMTString();
	if (path) s+="; path="+path;
	document.cookie=s;
}

function getCookie(name) {
	if (document.cookie.length>0) {
		search=name+"=";
		offset=document.cookie.indexOf(search);
		if (offset!=-1) {
			offset+=search.length;
			end=document.cookie.indexOf(";",offset);
			if (end==-1) {
				end=document.cookie.length;
			}
			 return document.cookie.substring(offset,end);
		}
	}
}

function escapeArray(array) {
	s="";
	for (i=0;i<array.length;i++) {
		if (i>0) s+="&";
		s+=escape(array[i]);
	}
	return s;
}

function unescapeArray(s) {
	array=new Array();
	pos=0;
	end=0;
	i=0;
	if (s) {
		while (pos<s.length) {
			end=s.indexOf("&",pos);
			if (end==-1) end=s.length;
			array[i++]=unescape(s.substring(pos,end));
			pos=end+1;
		}
	}
	return array;
}

if(!Array.prototype.push) {
  function array_push() {
        for(var i=arguments.length-1; i>=0; i--){
      this[this.length] = arguments[i];
        }
        return this.length
  }
  Array.prototype.push = array_push;
}

function toWarenkorb(cookiename,id,an) {
	var keks=unescapeArray(getCookie(cookiename));
	var neu=new Array();
	var found=false;
	for (var i=0;i<keks.length;i++) {
		var o=keks[i];
		if (an) {
			if (o==id) found=true;
			if (o>0) neu.push(o);
		}
		else {
			if (o>0 && o!=id) neu.push(o);
		}
	}
	if (an && !found) neu.push(id);
	setCookie(cookiename,escapeArray(neu),now(60*60*12),"/");
}