var visit_schedule = [];

        // maandag

        visit_schedule[1]   = '13:00 uur';
        visit_schedule[2]   = '14:30 uur';
        visit_schedule[3]   = '16:00 uur';
        
        // dinsdag

        visit_schedule[4]   = '9:30 uur';
        visit_schedule[5]   = '11:00 uur';
        visit_schedule[6]   = '12:30 uur';
        visit_schedule[7]   = '14:00 uur';
        visit_schedule[8]   = '15:30 uur';
        
        // woensdag

        visit_schedule[9]   = '9:30 uur';
        visit_schedule[10]  = '11:00 uur';
        visit_schedule[11]  = '12:30 uur';
        visit_schedule[12]  = '14:00 uur';
        visit_schedule[13]  = '15:30 uur';
        
        // donderdag

        visit_schedule[14]  = '9:30 uur';
        visit_schedule[15]  = '11:00 uur';
        visit_schedule[16]  = '12:30 uur';
        visit_schedule[17]  = '14:00 uur';
        visit_schedule[18]  = '15:30 uur';
        
        // 19  Goor / Haarlem
        visit_schedule[19]  = '19:00 uur';

        // vrijdag
        
        visit_schedule[20]  = '9:30 uur';
        visit_schedule[21]  = '11:00 uur';
        visit_schedule[22]  = '12:30 uur';
        visit_schedule[23]  = '14:00 uur';
        visit_schedule[24]  = '15:30 uur';
        
        // 25 Rotterdam
        visit_schedule[25]  = '19:00 uur';

        // zaterdag
        
        visit_schedule[26]  = '9:00 uur';
        visit_schedule[27]  = '10:30 uur';
        visit_schedule[28]  = '12:00 uur';
        visit_schedule[29]  = '13:30 uur';
        visit_schedule[30]  = '15:00 uur';
        visit_schedule[31]  = '15:30 uur';

        // zondag
        
        visit_schedule[32]  = '12:00 uur';
        visit_schedule[33]  = '13:30 uur';
        visit_schedule[34]  = '15:00 uur';
        visit_schedule[35]  = '15:30 uur';


        function date_as_number_to_day_schedule(date_as_number, city) {

            if (date_as_number == '0') {
                var day_schedule = ["32", "33", "34", "35"];
            } else if (date_as_number == '1') {
                var day_schedule = ["1", "2", "3"];
            } else if (date_as_number == '2') {
                var day_schedule = ["4", "5", "6", "7", "8"];
            } else if (date_as_number == '3') {
                var day_schedule = ["9", "10", "11", "12", "13"];
            } else if (date_as_number == '4') {
                var day_schedule = ["14", "15", "16", "17", "18"];
        
                if (city == 'Goor' || city == 'Haarlem') {
                    day_schedule.push(19);
                }
        
            } else if (date_as_number == '5') {
                var day_schedule = ["20", "21", "22", "23", "24"];
        
                if (city == 'Rotterdam') {
                    day_schedule.push(25);
                }
        
            } else if (date_as_number == '6') {
               var day_schedule = ["26", "27", "28", "29", "30", "31"];
            } else {
                var day_schedule = [];
            }
        
            return day_schedule;
        
        }
                
        function date_to_date_as_number(ddmmyy) {
        
            var ddmmyy_array    = ddmmyy.split("/");
        
            var date = new Date();
        
            date.setDate(ddmmyy_array[0]);
            date.setMonth(ddmmyy_array[1] - 1);
            date.setFullYear(ddmmyy_array[2]);
        
            var date_as_number = date.getDay();
        
            return date_as_number;
        
        }
        
        function remove_all_options(formname, fieldname) {
        
            var i;
            
            for(i = document[formname][fieldname].options.length-1; i >=0; i--) {
                document[formname][fieldname].remove(i);
            }  
	    
	    document[formname][fieldname].disabled = false;//Nathan 03 2009
        }
        
        function parse_day_schedule(day_schedule, formname, fieldname) {
        
            for (var i = 0; i < day_schedule.length; i++) {
                var optn = document.createElement("option");
                optn.value = day_schedule[i];
                optn.text = visit_schedule[day_schedule[i]];        
                document[formname][fieldname].options.add(optn);
                
            }
        }