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原生最简的JS日历插件代码

时间：2013-08-09 08:31 来源：互联网作者：源码搜藏收藏推荐

<!DOCTYPE html>
<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta charset="utf-8" />
    <title>日历 - 插件</title>
    <style>
        * {padding:0;margin:0;font-size:12px;}
        .fl {float:left}
        .fr {float:right}
        .dn {display:none}
        /*日历 begin*/
.data_box           {width:260px; }
.showDate           {width:248px;height:30px;line-height:30px;padding:0 5px;border:1px solid #e1e1e1;color:#999;display:block;cursor:pointer}
.show_mn            {text-align:center;padding:0 20px;}
.sel_date           {margin-top:10px;border:1px solid #999;padding:3px}
.data_table         {width:100%;margin-top:10px;}
.data_table td      {text-align:center;cursor:pointer;height:24px;font-size:14px;}
.data_table td.active      {color:#fff;background-color:#999}
.data_table td.hover{color:blue;}
.showDate2          {width:35px;padding:3px 5px;color:#999;border:1px solid #e1e1e1;text-align:center}
.showDate2.active   {border:1px solid #c50000; }
.prev_m,.next_m     {width:10px;height:22px;display:block;background-color:#0094ff;color:#fff;cursor:pointer;text-align:center;font: bold 12px/22px "宋体"}
.prev_y,.next_y     {width:18px;height:22px;display:block;background-color:#0094ff;color:#fff;cursor:pointer;text-align:center;font: bold 12px/22px "宋体";margin:0 5px;}
/*日历 end*/
    </style>
    <script src="http://www.codefans.net/js/base.js" type="text/javascript"></script>
    <script>
        LiChang = {
            getByClass: function (oPare, cla) {
                var oChild = oPare.getElementsByTagName("*");
                var arr = [];
                for (var i = 0; i < oChild.length; i++) {
                    var arrCla = oChild[i].className.split(" ");
                    var j;
                    for (var j in arrCla) {
                        if (arrCla[j] == cla) {
                            arr.push(oChild[i]);
                            break;
                        }
                    }
                }
                return arr;
            }
        }
        function showDate(option) {
            this.obj = document.getElementById(option.id);
        }
        showDate.prototype.init = function () {
            var _self = this;
            _self.dateText = LiChang.getByClass(_self.obj, "showDate")[0];
            _self.dateBox = LiChang.getByClass(_self.obj, "sel_date")[0];
            _self.yearBox = LiChang.getByClass(_self.obj, "year")[0];
            _self.mnBox = LiChang.getByClass(_self.obj, "month")[0];
            _self.dataTable = LiChang.getByClass(_self.dateBox, "data_table")[0];
            _self.tbody = _self.dataTable.tBodies[0];
            _self.td = _self.tbody.getElementsByTagName("td");
            _self.prevM = LiChang.getByClass(_self.dateBox, "prev_m")[0];
            _self.nextM = LiChang.getByClass(_self.dateBox, "next_m")[0];
            _self.prevY = LiChang.getByClass(_self.dateBox, "prev_y")[0];
            _self.nextY = LiChang.getByClass(_self.dateBox, "next_y")[0];
            //显示日历
            _self.dateText.onclick = function () {
                _self.changeDefault(this);
                _self.show();
                //_self.showNow();
                //_self.dateText.blur();
            }
            //点击空白 隐藏日历
            document.onclick = function (event) {
                event = event || window.event;
                var Target = event.target || event.srcElement;
                _self.hide(event, Target, this);
            }
            //点击选择日期
            for (var i = 0; i < _self.td.length; i++) {
                _self.td[i].onclick = function () {
                    var newDd = this.innerHTML;
                    var newYear = parseInt(_self.yearBox.value, 10);
                    var newMn = parseInt(_self.mnBox.value, 10);
                    if (newDd.match(/^\s{0}$/g)) {  //如果td有值;
                        return false;
                    }
                    if (isNaN(newYear) || isNaN(newMn) || newYear < 1900 || newYear > 2099 || newMn < 1 || newMn > 12) {  //如果td有值;
                        //alert("请填写正确的年和月！");
                        return false;
                    }
                    _self.dateText.innerHTML = newYear + "年" + newMn + "月" + newDd + "日";
                    _self.dateBox.className += " ";
                    _self.dateBox.className += "dn";
                }
                _self.td[i].onmouseover = function () {
                    if (this.className.indexOf("hove") == -1) {
                        this.className += " hover";
                    }
                }
                _self.td[i].onmouseout = function () {
                    this.className = this.className.replace("hover", "")
                }
            }
            //点击切换月份
            _self.prevM.onclick = _self.nextM.onclick = function () {
                _self.changeMn(this);
                return this;
            }
            //点击切换年份
            _self.prevY.onclick = _self.nextY.onclick = function () {
                _self.changeYr(this);
                return this;
            }
            _self.yearBox.onkeyup = _self.mnBox.onkeyup = function () {
                this.value = this.value.replace(/\D/g, "");
                var year = parseInt(_self.yearBox.value, 10);
                var month = parseInt(_self.mnBox.value, 10);
                if (!isNaN(year) && year <= 2099 && year >= 1900 && !isNaN(month) && month <= 12 && month >= 1) {
                    _self.showAllDay(year, month - 1);
                }
                if (this == _self.yearBox && year >= 1900 && year <= 2099) {
                    _self.mnBox.focus();
                } else if (this == _self.mnBox && (month < 1 || month > 12)) {
                    if (this.value.slice(0, 1) > 1) { //如果第一位大于1
                        this.value = this.value.slice(0, 1);
                    } else if (month > 12) { //
                        this.value = 12;
                    }
                    year = parseInt(_self.yearBox.value, 10);
                    month = parseInt(_self.mnBox.value, 10);
                    _self.showAllDay(year, month - 1);
                }
            }
            _self.yearBox.onblur = function () {
                var year = parseInt(this.value, 10);
                if (year < 1900 || year > 2099 || isNaN(year)) {
                    this.focus();
                    alert("请输入正确年份！");
                    this.value = "";
                }
            }
            _self.mnBox.onfocus = function () {
                var year = parseInt(_self.yearBox.value, 10);
                if (isNaN(year)) {
                    _self.yearBox.focus();
                }
            }
            _self.mnBox.onblur = function () {
                var month = parseInt(this.value, 10);
                var year = parseInt(_self.yearBox.value, 10);
                if (month < 1 || month > 12 || isNaN(month)) {
                    alert("请输入正确月份！");
                    this.value = "";
                }
            }
        }
        //点击切换月份
        showDate.prototype.changeMn = function (obj) {
            var _self = this;
            var NewMn = parseInt(_self.mnBox.value, 10);
            var newYear = parseInt(_self.yearBox.value, 10);
            if (isNaN(NewMn) || isNaN(newYear)) {
                alert("请填写正确的年和月！");
                return false;
            }
            if (obj == _self.nextM) {
                NewMn++;
            } else {
                NewMn--;
            }
            if (NewMn < 1) {
                NewMn = 12;
                newYear -= 1;
            } else if (NewMn > 12) {
                NewMn = 1;
                newYear += 1;
            }
            _self.mnBox.value = NewMn;
            _self.showNow(newYear, NewMn);
        }
        //点击切换年份
        showDate.prototype.changeYr = function (obj) {
            var _self = this;
            var NewMn = parseInt(_self.mnBox.value, 10);
            var newYear = parseInt(_self.yearBox.value, 10);
            if (isNaN(NewMn) || isNaN(newYear)) {
                alert("请填写正确的年和月！");
                return false;
            }
            if (obj == _self.nextY) {
                newYear++;
            } else {
                newYear--;
            }
            if (newYear < 1900) {
                newYear = 1900;
            } else if (newYear > 2099) {
                newYear = 2099;
            }
            _self.mnBox.value = NewMn;
            _self.showNow(newYear, NewMn);
        }
        //文本框 清空初始值
        showDate.prototype.changeDefault = function (obj) {
            var _self = this;
            var deVal = obj.innerHTML;
            var regExp = /^\s{0,}$/g;
            if (deVal == "点击选择日期") {
                obj.innerHTML = "";
                _self.showNow();
            } else if (deVal.match(regExp) === null && _self.dateBox.className.indexOf("dn") != -1) { //如果显示的是非空字符
                var dayArr = deVal.match(/[0-9]{1,4}/g);
                _self.showNow(dayArr[0], dayArr[1], dayArr[2]); //刷新日期
            }
        }
        //文本框 还原初始值
        showDate.prototype.changeDefault2 = function (obj) {
            var _self = this;
            var deVal = obj.innerHTML;
            if (deVal.match(/^\s{0}$/)) {
                obj.innerHTML = "点击选择日期";
            }
        }
        //显示日历
        showDate.prototype.show = function () {
            var _self = this;
            if (_self.dateBox.className.indexOf("dn") != -1) {
                var cls = _self.dateBox.className;
                _self.dateBox.className = cls.replace("dn", "");
            }
        }
        //隐藏日历
        showDate.prototype.hide = function (event, Target, obj) {
            var _self = this;
            var oPare = Target.parentNode;
            var isChild = true; //默认是子元素
            if (oPare == obj || Target == obj) {
                isChild = false;
            } else {
                loop: while (oPare != _self.obj) {
                    oPare = oPare.parentNode;
                    if (oPare == obj) {
                        isChild = false;
                        break loop;
                    }
                }
            }
            if (!isChild && _self.dateBox.className.indexOf("dn") == -1) {
                _self.dateBox.className += " ";
                _self.dateBox.className += "dn";
                _self.changeDefault2(_self.dateText);
            }
        }
        //填充年、月
        showDate.prototype.showNow = function (yr, mn, date) {
            var _self = this;
            var now = new Date();
            var year = yr || now.getFullYear();
            var month = mn - 1 || now.getMonth();
            var dd = date || now.getDate();
            //填充 年 和 月
            _self.yearBox.value = year;
            _self.mnBox.value = mn || now.getMonth() + 1;
            //填充日期
            _self.showAllDay(year, month, dd);
        }
        //填充当月的所有日期
        showDate.prototype.showAllDay = function (Yr, Mn, Dd) {
            var _self = this;
            var arr31 = [1, 3, 5, 7, 8, 10, 12];
            var is31 = true;
            var newDd = new Date();  //根据传入的数值生成新的日期
            Dd = Dd ? Dd : newDd.getDate();
            newDd.setFullYear(Yr, Mn, Dd);
            var year = newDd.getFullYear(),
                month = newDd.getMonth(),
                dd = newDd.getDate();
            var firstD = new Date();
            firstD.setFullYear(year, month, 1);
            var firstDay = firstD.getDay();
            var str31 = arr31.join(",");
            var regExp = eval("/" + (month + 1) + ",|," + (month + 1) + ",|," + (month + 1) + "/g");
            var dayLen = 31;
            //判断每个月有多少天
            if (str31.search(regExp) == -1) {
                dayLen = 30;
            }
            //清空日期
            for (var i = 0; i < _self.td.length; i++) {
                _self.td[i].innerHTML = "";
                _self.td[i].className = _self.td[i].className.replace("active", "");
            }
            //如果有31天
            for (var j = 0; j < dayLen; j++) {
                _self.td[j + firstDay].innerHTML = j + 1;
                if (j + 1 == dd && _self.td[j + firstDay].className.indexOf("active") == -1) {
                    _self.td[j + firstDay].className += " ";
                    _self.td[j + firstDay].className += "active";
                }
            }
        }
        //函数调用
        window.onload = function () {
            var showDate1 = new showDate({ id: "data_box" });
            showDate1.init();
        }
    </script>
</head>
<body>
    <div class="clearfix dome3_box">
        
        <div class="data_box" id="data_box">
            <span  class="showDate" >点击选择日期</span>
            <div class="sel_date dn">
                <div class="clearfix">
                    <span class="prev_y fl"><<</span><span class="prev_m fl"><</span>
                    <span class="next_y fr">>></span><span class="next_m fr">></span>
                    <div class="show_mn">
                        <input type="text" class="showDate2 year" value="选择年份" />
                        <span class="ml5 mr5">年</span>
                        <input type="text" class="showDate2 month" value="选择月份" />
                        <span class="ml5">月</span>
                    </div>              
                </div>
                <table class="data_table">
                    <thead>
                        <tr>
                            <td>日</td><td>一</td><td>二</td><td>三</td><td>四</td><td>五</td><td>六</td>
                        </tr>
                    </thead>
                    <tbody>
                        <tr>
                            <td>1</td><td></td><td></td><td></td><td></td><td></td><td></td>
                        </tr>
                        <tr>
                            <td>1</td><td></td><td></td><td></td><td></td><td></td><td></td>
                        </tr>
                        <tr>
                            <td></td><td></td><td></td><td></td><td></td><td></td><td></td>
                        </tr>
                        <tr>
                            <td></td><td></td><td></td><td></td><td></td><td></td><td></td>
                        </tr>
                        <tr>
                            <td></td><td></td><td></td><td></td><td></td><td></td><td></td>
                        </tr>
                        <tr>
                            <td></td><td></td><td></td><td></td><td></td><td></td><td></td>
                        </tr>
                    </tbody>
                </table>
            </div>
        </div>
        
    </div>
</body>
</html>

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