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=1;var dt_datetime=(str_datetime==null||str_datetime==""?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 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);str_buffer+="\n";for(var n=0;n<7;n++) str_buffer+=" \n";str_buffer+="\n";while(dt_current_day.getMonth()==dt_datetime.getMonth()||dt_current_day.getMonth()==dt_firstday.getMonth()){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()) str_buffer+=" \n";dt_current_day.setDate(dt_current_day.getDate()+1);} str_buffer+="\n";} 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) str_buffer+=" ";else str_buffer+=" ";if(dt_current_day.getMonth()==dt_datetime.getMonth()) str_buffer+=""+ "";else str_buffer+=""+ "";str_buffer+=dt_current_day.getDate()+"
\n"+ "
\n"+ "\n"+ "\n";var vWinCal=window.open("","Calendar","width=200,height=250,status=no,resizable=yes,top=200,left=200");vWinCal.opener=self;var calc_doc=vWinCal.document;calc_doc.write(str_buffer);calc_doc.close();} function str2dt(str_datetime){var re_date=/^(\d+)\-(\d+)\-(\d+)\s+$/;if(!re_date.exec(str_datetime)) return alert("Invalid Datetime format: "+str_datetime);return(new Date(RegExp.$3,RegExp.$2-1,RegExp.$1,RegExp.$4,RegExp.$5,RegExp.$6));} function dt2dtstr(dt_datetime){return(new String(dt_datetime.getDate()+"-"+(dt_datetime.getMonth()+1)+"-"+dt_datetime.getFullYear()+" "));} function dt2tmstr(dt_datetime){return(new String(dt_datetime.getHours()+":"+dt_datetime.getMinutes()+":"+dt_datetime.getSeconds()));}