function show_calendar(str_target, str_datetime) { var arr_months = ["Januar", "Februar", "März", "April", "Mai", "Juni", "Juli", "August", "September", "Oktober", "November", "Dezember"]; var week_days = ["So", "Mo", "Di", "Mi", "Do", "Fr", "Sa"]; var n_weekstart = 1; // day week starts from (normally 0 or 1) var dt_datetime = (str_datetime == null || str_datetime =="" || str_datetime == "0000-00-00 00:00:00" ? new Date() : str2dt(str_datetime)); var dt_prev_month = new Date(dt_datetime); dt_prev_month.setMonth(dt_datetime.getMonth()-1); var dt_next_month = new Date(dt_datetime); dt_next_month.setMonth(dt_datetime.getMonth()+1); var dt_firstday = new Date(dt_datetime); dt_firstday.setDate(1); dt_firstday.setDate(1-(7+dt_firstday.getDay()-n_weekstart)%7); var dt_lastday = new Date(dt_next_month); dt_lastday.setDate(0); var dt_current2 = new Date(); var yearselect = '\n'; // html generation (feel free to tune it for your particular application) // print calendar header var str_buffer = new String ( "\n"+ "\n"+ " Calendar\n"+ "\n"+ "\n"+ "\n"+ "\n\n
\n"+ "\n"+ "\n \n"+ " \n"+ " \n\n" ); var dt_current_day = new Date(dt_firstday); // print weekdays titles str_buffer += "\n"; for (var n=0; n<7; n++) str_buffer += " \n"; // print calendar table str_buffer += "\n"; while (dt_current_day.getMonth() == dt_datetime.getMonth() || dt_current_day.getMonth() == dt_firstday.getMonth()) { // print row heder str_buffer += "\n"; for (var n_current_wday=0; n_current_wday<7; n_current_wday++) { if (dt_current_day.getDate() == dt_datetime.getDate() && dt_current_day.getMonth() == dt_datetime.getMonth()) // print current date str_buffer += " \n"; dt_current_day.setDate(dt_current_day.getDate()+1); } // print row footer str_buffer += "\n"; } // print calendar footer str_buffer += "
"+ "\"previous"+ "" +arr_months[dt_datetime.getMonth()]+"  "+yearselect+""+ "\"next
"+ ""+ week_days[(n_weekstart+n)%7]+"
"; else if (dt_current_day.getDay() == 0 || dt_current_day.getDay() == 6) // weekend days str_buffer += " "; else // print working days of current month str_buffer += " "; if (dt_current_day.getMonth() == dt_datetime.getMonth()) { // print days of current month str_buffer += ""+""; } else { // print days of other months str_buffer += ""+""; } str_buffer += dt_current_day.getDate()+"
\n" + "
\n" + "\n" + "\n"; var vWinCal = window.open("", "Calendar", "width=250,height=240,statusbar=no,toolbar=no,location=no,menubar=no,status=no,resizable=yes,top=200,left=200"); vWinCal.opener = self; vWinCal.focus(); var calc_doc = vWinCal.document; calc_doc.write (str_buffer); calc_doc.close(); } // datetime parsing and formatting routimes. modify them if you wish other datetime format // Format dd.mm.yyyy function str2dt (d) { return (new Date (d.substr(6,4), (d.substr(3,2)*1-1), d.substr(0,2))); } // Format dd.mm.yyyy function dt2dtstr (dt_datetime) { return (new String ( add0(dt_datetime.getDate())+"."+(add0(dt_datetime.getMonth()+1))+"."+dt_datetime.getFullYear())); } function add0(num) { if (num < 10 ) return "0"+num; else return num; }