/*This function will test to make sure a valid date has been entered. If it is valid it will return "true". If not, it will return "false".*/ function validateDate(month, day, year) { //if no year is given assume current year //unless date has passed, then assume next year if (year == null) { time = new Date(); today_year = time.getYear(); today_month = time.getMonth(); today_day = time.getDay(); if ((month > today_month) || ((month == today_month) && (day >= today_day))) year = today_year + 1900; else year = today_year + 1901; } if ((month == null) || (day == null) || (year == null)) return false; if (navigator.appName.indexOf("WebTV")!=-1) { ;//do nothing for now } else { var numDays; switch(month) { case 1: case 3: case 5: case 7: case 8: case 10: case 12: numDays = 31; break; case 4: case 6: case 9: case 11: numDays = 30; break; case 2: numDays = 28; break; } //Check for leap year if ((month == 2) && (day == 29)) { if (year % 100 == 0) { if (year % 400 != 0) return false; } else { if (year % 4 != 0) return false; } } else if (day > numDays) { //Compare days enter to maximum number of days in the given month return false; } return true; } } function validateFormDate(form_flds) { ix = form_flds.month.options.selectedIndex; ix2 = form_flds.day.options.selectedIndex; month = parseInt(form_flds.month.options[ix].value); day = parseInt(form_flds.day.options[ix2].value); dates_rqd = false; if (form_flds.dates_rqd) dates_rqd = form_flds.dates_rqd.value; if (navigator.appName.indexOf("WebTV")!=-1) { //do nothing for now } else { if (!datesCheck(month,day,dates_rqd)) return false; return true; } } function validateFormDates(form_flds) { ix = form_flds.month.options.selectedIndex; ix2 = form_flds.day.options.selectedIndex; month = parseInt(form_flds.month.options[ix].value); day = parseInt(form_flds.day.options[ix2].value); ix = form_flds.depart_month.options.selectedIndex; ix2 = form_flds.depart_day.options.selectedIndex; depart_month = parseInt(form_flds.depart_month.options[ix].value); depart_day = parseInt(form_flds.depart_day.options[ix2].value); dates_rqd = false; if (form_flds.dates_rqd) dates_rqd = form_flds.dates_rqd.value; if (navigator.appName.indexOf("WebTV")!=-1) { //do nothing for now } else { if (!datesCheck(month,day,dates_rqd)) return false; if (!datesCheck(depart_month,depart_day,dates_rqd)) return false; if (month+day == depart_month+depart_day) { changeCheckOut(); } return true; } } function datesCheck (month, day, dates_rqd) { if (dates_rqd) { if (day < 0 || month < 0) { alert("Please enter both your Check-in AND Check-out dates"); return false; } } if ((day > 0) && (month < 0)) { alert("You have entered a partial date.\n" + "Please enter a month or select 'Day' to clear the day."); return false; } if ((month > 0) && (day < 0)) { alert("You have entered a partial date.\n" + "Please enter a day or select 'Month' to clear the month."); return false; } var today = new Date(); var today_year = today.getFullYear(); var today_month = today.getMonth(); var today_day = today.getDay(); var year = ((month > today_month) || ((month == today_month) && (day >= today_day))) ? today_year : today_year + 1; if (!validateDate(month,day,year)) { alert("Invalid date:\nNot that many days in " + monthNames(month)); return false; } return true; } function changeCheckOut() { if ((document.datesform.depart_month.selectedIndex == 0) || (document.datesform.depart_month.selectedIndex < document.datesform.month.selectedIndex) || ((document.datesform.depart_month.selectedIndex == document.datesform.month.selectedIndex) && (document.datesform.depart_day.selectedIndex <= document.datesform.day.selectedIndex))) { if(document.datesform.month.selectedIndex != 0) { if (document.datesform.month.selectedIndex == 2) { var time = new Date(); var today_year = time.getYear() + 1900; var today_month = time.getMonth(); //if the current month is past February, the following year must be assumed if(today_month > 2) today_year = today_year + 1; if (document.datesform.day.selectedIndex == 28 ) { if ( ( (today_year%4==0)&&(today_year%100 != 0) ) || (today_year%400==0) ) { // leap year document.datesform.depart_day.selectedIndex = 29; } else { document.datesform.depart_day.selectedIndex = 1; document.datesform.depart_month.selectedIndex = 3; } } else if (document.datesform.day.selectedIndex > 28 ) { document.datesform.depart_day.selectedIndex = 1; document.datesform.depart_month.selectedIndex = 3; } else { document.datesform.depart_day.selectedIndex = document.datesform.day.selectedIndex + 1; document.datesform.depart_month.selectedIndex = document.datesform.month.selectedIndex; } } else if ((document.datesform.day.selectedIndex == 30 ) && ((document.datesform.month.selectedIndex == 4) || (document.datesform.month.selectedIndex == 6) || (document.datesform.month.selectedIndex == 9) || (document.datesform.month.selectedIndex == 11))) { document.datesform.depart_day.selectedIndex = 1; document.datesform.depart_month.selectedIndex = document.datesform.month.selectedIndex + 1; } else if (document.datesform.day.selectedIndex > 30 ) { document.datesform.depart_day.selectedIndex = 1; if (document.datesform.month.selectedIndex == 12){ //move to January document.datesform.depart_month.selectedIndex = 1; } else { document.datesform.depart_month.selectedIndex = document.datesform.month.selectedIndex + 1; } } else { document.datesform.depart_day.selectedIndex = document.datesform.day.selectedIndex + 1; document.datesform.depart_month.selectedIndex = document.datesform.month.selectedIndex; } } } } function monthNames(month) { var name; switch(month) { case 2: name = "February"; break; case 4: name = "April"; break; case 6: name = "June"; break; case 9: name = "September"; break; case 11: name = "November"; break; } return name; }