function show_calendar(str_target, str_datetime) { var arr_months = ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"]; var week_days = ["Su", "Mo", "Tu", "We", "Th", "Fr", "Sa"]; var n_weekstart = 0; // day week starts from (normally 0 or 1) var dt_datetime = (str_datetime == null || str_datetime =="" ? new Date() : str2dt4(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); // 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()]+" "+dt_datetime.getFullYear()+""+ "\"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=200,height=200,status=no,resizable=yes,top=200,left=200"); vWinCal.focus(); vWinCal.opener = self; 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 function str2dt4 (str_datetime) { var re_date = /^(\d+)\/(\d+)\/(\d+)$/; if (!re_date.exec(str_datetime)) return alert("Invalid Datetime format: "+ str_datetime); return (new Date (RegExp.$3, RegExp.$1-1, RegExp.$2)); } function dt2dtstr4 (dt_datetime) { var monthStr = new String(dt_datetime.getMonth()+1); var dateStr = new String(dt_datetime.getDate()); var yearStr = new String(dt_datetime.getFullYear()); if (monthStr.length == 1) monthStr = "0" + monthStr; if (dateStr.length == 1) dateStr = "0" + dateStr; return (new String ( (monthStr)+"/"+dateStr+"/"+yearStr)); }