function show_calendar(str_ptr, str_mm, str_dd, str_yy) { var arr_months = ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"]; var week_days = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"]; var n_weekstart = 1; // day week starts from (normally 0 or 1) var tempDate = str_mm + "/" + str_dd + "/" + str_yy; var dt_datetime = (str_dd == null || str_dd =="" ? str2dt4(str_mm) : str2dt4(tempDate)); var currentDate = new Date(); var currentMonth = currentDate.getMonth()+1; var currentDay = currentDate.getDate(); var currentYear = currentDate.getFullYear(); var inMonth = dt_datetime.getMonth()+1; var inDay = dt_datetime.getDate(); var inYear = dt_datetime.getFullYear(); var nextFlag = 1; var prevFlag = 1; var daysEl = daysElapsed(currentDay,currentMonth,currentYear,inDay,inMonth,inYear); // See if the date coming in has already passed us by // If so, switch the year of the month being displayed if (daysEl < 0) { dt_datetime.setYear(inYear+1); inYear = dt_datetime.getFullYear(); } // If this month is showing, don't allow user to view previous month if ((currentMonth == inMonth) && (currentYear == inYear)) { prevFlag = 0; } // If the next month will be the same month of the following year, // (i.e., next month is Jan 2003 and current month is Jan 2002) // don't allow user to view next month if ((inMonth+1 == currentMonth) && (inYear-1 == currentYear)) { nextFlag = 0; } //var dt_datetime = (str_month == null || str_month =="" ? new Date() : str2dt4(str_month+"/1/2002")); var dt_prev_month = new Date(dt_datetime); dt_prev_month.setMonth(dt_datetime.getMonth()-1); if (dt_datetime.getMonth()%12 != (dt_prev_month.getMonth()+1)%12) { dt_prev_month.setMonth(dt_datetime.getMonth()); dt_prev_month.setDate(0); } var dt_next_month = new Date(dt_datetime); dt_next_month.setMonth(dt_datetime.getMonth()+1); if ((dt_datetime.getMonth() + 1)%12 != dt_next_month.getMonth()%12) dt_next_month.setDate(0); 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 //alert(dt_prev_month); var str_buffer = new String ( "\n"+ "\n"+ " Calendar\n"+ "\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 += "
"); if (prevFlag == 1) { str_buffer += ""+ "<<"; } else { str_buffer += " "; } str_buffer += ""+ "" +arr_months[dt_datetime.getMonth()]+" "+dt_datetime.getFullYear()+""; if (nextFlag == 1) { str_buffer += ""+ ">>"; } else { str_buffer += " "; } str_buffer += "
"+ ""+ week_days[(n_weekstart+n)%7]+"
"; //str_buffer += " "; 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 += ""+ //str_buffer += ""+ ""; else // print days of other months str_buffer += ""+ //str_buffer += ""+ ""; str_buffer += dt_current_day.getDate()+"
\n" + "
\n" + "\n" + "\n"; var Vars; if (str_ptr == "document.book.dep") { Vars = "width=240,height=210,status=no,resizable=yes,top=225,left=200"; } else { Vars = "width=240,height=210,status=no,resizable=yes,top=293,left=200"; } var vWinCal = window.open("", "Calendar", Vars); 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 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) { return (new String ( (dt_datetime.getMonth()+1)+"/"+dt_datetime.getDate()+"/"+dt_datetime.getFullYear())); }