• 多少天后的日期


    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

    <html>
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=uft-8">
    <script language="javascript">

    Date.prototype.format = function (format)
    {
    var o = {
    "M ": this.getMonth() 1, //month
    "d ": this.getDate(), //day
    "h ": this.getHours(), //hour
    "m ": this.getMinutes(), //minute
    "s ": this.getSeconds(), //second
    "q ": Math.floor((this.getMonth() 3) / 3), //quarter
    "S": this.getMilliseconds() //millisecond
    }
    if (/(y )/.test(format)) format = format.replace(RegExp.$1,
    (this.getFullYear() "").substr(4 - RegExp.$1.length));
    for (var k in o) if (new RegExp("(" k ")").test(format))
    format = format.replace(RegExp.$1,
    RegExp.$1.length == 1 ? o[k] :
    ("00" o[k]).substr(("" o[k]).length));
    return format;
    }

    //页面调用
    function onBigBlur() {
    var bigCycle = document.getElementById("txt_dbigcycle");
    var bignextTime = document.getElementById("txt_dnextbigtime");
    var bigTime = document.getElementById("txt_dbigtime").value.replace('-', '/').replace('-', '/');
    var d = new Date(bigTime);
    var LSTR_Date = d.format("yyyyMMdd");
    //(日期表示只有这一种格式,不支持民国年)
    var LSTR_AddDays = parseInt(bigCycle.value);
    var LSTR_DateType = "YYYYMMDD";
    var result = AddDate(LSTR_Date, LSTR_AddDays, LSTR_DateType);

    var LSTR_YY = parseInt(result.substr(0, 4), 10);
    var LSTR_MM = parseInt(result.substr(4, 2), 10);
    var LSTR_DD = parseInt(result.substr(6, 2), 10);
    bignextTime.value= LSTR_YY "-" LSTR_MM "-" LSTR_DD;
    }

    function AddDate(LISTR_Date, LISTR_AddDays, LISTR_DateType) {
    var LSTR_YY = 0;
    var LSTR_MM = 0;
    var LSTR_DD = 0;
    var LINT_FLAG = 0;

    //检查日期格式为 "YYYYMMDD" 或
    //"MMDDYYYY" 且长度为8码
    if ((LISTR_DateType != "YYYYMMDD") && (LISTR_DateType != "MMDDYYYY") && (LISTR_Date.length != 8))
    return false;
    if (LISTR_DateType == "MMDDYYYY")
    LISTR_Date = LISTR_Date.substr(4, 4) LISTR_Date.substr(0, 4);
    LSTR_YY = parseInt(LISTR_Date.substr(0, 4), 10);
    LSTR_MM = parseInt(LISTR_Date.substr(4, 2), 10);
    LSTR_DD = parseInt(LISTR_Date.substr(6, 2), 10) parseInt(LISTR_AddDays, 10);
    while (LINT_FLAG == 0) {
    switch (LSTR_MM) {
    case 2:
    if ((LSTR_YY % 4) != 0) {
    if (LSTR_DD > 28) {
    LSTR_DD -= 28;
    LSTR_MM = 3;
    }
    else {
    LINT_FLAG = 1;
    }
    }
    else {
    if (((LSTR_YY % 100) == 0) && ((LSTR_YY % 400) != 0)) {
    if (LSTR_DD > 28) {
    LSTR_DD -= 28;
    LSTR_MM = 3;
    }
    else {
    LINT_FLAG = 1;
    }
    }
    else {
    if (LSTR_DD > 29) {
    LSTR_DD -= 29;
    LSTR_MM = 3;
    }
    else {
    LINT_FLAG = 1;
    }
    }
    }
    break;
    case 4:
    case 6:
    case 9:
    case 11:
    if (LSTR_DD > 30) {
    LSTR_DD -= 30;
    LSTR_MM = 1;
    }
    else { LINT_FLAG = 1; }
    break;
    case 1:
    case 3:
    case 5:
    case 7:
    case 8:
    case 10:
    if (LSTR_DD > 31) {
    LSTR_DD -= 31;
    LSTR_MM = 1;
    }
    else {
    LINT_FLAG = 1;
    }
    break;
    case 12:
    if (LSTR_DD > 31) {
    LSTR_DD -= 31;
    LSTR_MM = 1;
    LSTR_YY = 1;
    }
    else {
    LINT_FLAG = 1;
    }
    break;
    default:
    return;
    break;
    }
    }
    if (LSTR_MM < 10) {
    LSTR_MM = "0" LSTR_MM;
    }
    if (LSTR_DD < 10) {
    LSTR_DD = "0" LSTR_DD;
    }
    if (LISTR_DateType == "MMDDYYYY")
    return LSTR_MM "" LSTR_DD "" LSTR_YY "";
    else
    return LSTR_YY "" LSTR_MM "" LSTR_DD "";
    }
    </script>

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  • 原文地址:https://www.cnblogs.com/jameslif/p/2494163.html
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