/*   many thanks to http://www.alistapart.com/stories/n4switch/   */

                function css_switch (sitestyle){
                        var expdate = new Date();
                        expdate.setTime(expdate.getTime() + (1000*3600*24*365));
                        document.cookie = 'sitestyle=' + sitestyle + '; expires=' + expdate.toGMTString() + '; path=/';
                        self.location = self.location;
                        location.reload();
                }

                var cookie_style = get_cookie_wert();
                var zeile = "<link rel='stylesheet' type='text/css' href='/style/"+cookie_style+"/site.css'>\n"
                document.write(zeile);

                function get_cookie_wert(){
                        var Wert = "normal";
                        var dc = document.cookie;
                        var prefix = "sitestyle=";
                        var begin = dc.indexOf("; " + prefix);
                        if (begin == -1) {
                                begin = dc.indexOf(prefix);
                                if (begin != 0) {
                                        Wert = "normal";
                                        return Wert;
                                }
                        } else
                                begin += 2;
                        var end = document.cookie.indexOf(";", begin);
                        if (end == -1)
                                end = dc.length;
                                Wert = unescape(dc.substring(begin + prefix.length, end));
                                return Wert;
                }


                function alpha (alphastyle){
                        var expdate = new Date();
                        expdate.setTime(expdate.getTime() + (1000*3600*24*365));
                        document.cookie = 'alphastyle=' + alphastyle + '; expires=' + expdate.toGMTString() + '; path=/';
                        self.location = self.location;
                        location.reload();
                        }
                if (document.cookie.indexOf('alphastyle=1')>=0)
                        document.write('<link rel="stylesheet" type="text/css" href="/style/alpha0.css">\n');
                else if (document.cookie.indexOf('alphastyle=2')>=0)
                        document.write('<link rel="stylesheet" type="text/css" href="/style/alpha2.css">\n');
                else if (document.cookie.indexOf('alphastyle=3')>=0)
                        document.write('<link rel="stylesheet" type="text/css" href="/style/alpha1.css">\n');


                function rueck (backstyle){
                        var expdate = new Date();
                        expdate.setTime(expdate.getTime() + (1000*3600*24*365));
                        document.cookie = 'backstyle=' + backstyle + '; expires=' + expdate.toGMTString() + '; path=/';
                        self.location = self.location;
                        location.reload();
                        }
                if (document.cookie.indexOf('backstyle=4')>=0)
                        document.write('<link rel="stylesheet" type="text/css" href="/style/back1.css">\n');
                else if (document.cookie.indexOf('backstyle=5')>=0)
                        document.write('<link rel="stylesheet" type="text/css" href="/style/back2.css">\n');
                else if (document.cookie.indexOf('backstyle=6')>=0)
                        document.write('<link rel="stylesheet" type="text/css" href="/style/back0.css">\n');


                function column (columnstyle){
                        var expdate = new Date();
                        expdate.setTime(expdate.getTime() + (1000*3600*24*365));
                        document.cookie = 'columnstyle=' + columnstyle + '; expires=' + expdate.toGMTString() + '; path=/';
                        self.location = self.location;
                        location.reload();
                        }
                if (document.cookie.indexOf('columnstyle=7')>=0)
                        document.write('<link rel="stylesheet" type="text/css" href="/style/column1.css">\n');
                else if (document.cookie.indexOf('columnstyle=8')>=0)
                        document.write('<link rel="stylesheet" type="text/css" href="/style/column2.css">\n');
                else if (document.cookie.indexOf('columnstyle=9')>=0)
                        document.write('<link rel="stylesheet" type="text/css" href="/style/column0.css">\n');

