日期的javascript验证

// Copyright (c) 2004-2007 koikikukan All Rights Reserved. // http://www.koikikukan.com/ // License is granted if and only if this entire // copyright notice is included. By Yujiro ARAKI. // Ver1.00 2006.03.15 initial version. // Ver1.01 2006.04.11 fix bug. // Ver1.02 2006.04.15 fix bug. // Ver1.03 2006.04.16 fix bug. // Ver1.04 2006.08.03 fix bug. // Ver1.05 2007.04.21 fix bug. var currentYear; var currentMonth; var currentDay; function setCurrentDate() { data = new Date(); currentYear = data.getYear(); currentYear = (currentYear < 2000) ? currentYear + 1900 : currentYear; currentMonth = data.getMonth() + 1; currentDay = data.getDate(); } function isToday(year, month, day) { if (year == currentYear && parseInt(month,10) == currentMonth && day == currentDay) { return true; } return false; } function isSaturday(year, month, day) { var week = new Date(year, month - 1, day).getDay(); if (week == 6) { return true; } return false; } function isHoliday(year, month, day) { var week = new Date(year, month - 1, day).getDay(); if (week == 0) { return true; } switch(parseInt(month,10)) { case 1: if (day == 1) { return true; } if (day == 2 && isSunday(year, month, 1)) { return true; } if (day == (getFirstMonday(year, month) + 7)) { return true; } break; case 2: if (day == 11) { return true; } if (day == 12 && isSunday(year, month, 11)) { return true; } break; case 3: if(year > 1979 && year < 2100) { if (day == parseInt(20.8431 + 0.242194 * (year - 1980) - parseInt((year - 1980) / 4))) { return true; } if (day == (parseInt(20.8431 + 0.242194 * (year - 1980) - parseInt((year - 1980) / 4)) + 1) && isSunday(year, month, day - 1)) { return true; } } break; case 4: if (day == 29) { return true; } if (day == 30 && isSunday(year, month, 29)) { return true; } break; case 5: if (day == 3 || day == 4 || day == 5) { return true; } if (day == 6 && (isSunday(year, month, 3) || isSunday(year, month, 4) || isSunday(year, month, 5))) { return true; } break; case 7: if (day == (getFirstMonday(year, month) + 14)) { return true; } break; case 9: if (day == (getFirstMonday(year, month) + 14)) { return true; } if(year > 1979 && year < 2100) { if (day == parseInt(23.2488 + 0.242194 * (year - 1980) - parseInt((year - 1980) / 4))) { return true; } if (day == (parseInt(23.2488 + 0.242194 * (year - 1980) - parseInt((year - 1980) / 4)) + 1) && isSunday(year, month, day - 1)) { return true; } } break; case 10: if (day == (getFirstMonday(year, month) + 7)) { return true; } break; case 11: if (day == 3 || day == 23) { return true; } if (day == 4 && isSunday(year, month, 3)) { return true; } if (day == 24 && isSunday(year, month, 23)) { return true; } break; case 12: if (day == 23) { return true; } if (day == 24 && isSunday(year, month, 23)) { return true; } break; } return false; } function isSunday(year, month, day) { var week = new Date(year, month - 1, day).getDay(); if (week == 0) { return true; } return false; } function getFirstMonday(year, month) { var monday; for(monday = 1; monday < 8; monday++) { if(new Date(year, month - 1, monday).getDay() == 1) { break; } } return monday; }