JQ 日期联动插件

/*
 * jQuery Date Selector Plugin
 * 日期联动选择插件
 *
 * Demo:
$("#calendar").DateSelector({
    ctlYearId: <年控件id>,
    ctlMonthId: <月控件id>,
    ctlDayId: <日控件id>,
    defYear: <默认年>,
    defMonth: <默认月>,
    defDay: <默认日>,
    minYear: <最小年|默认为1882年>,
    maxYear: <最大年|默认为本年>
});
HTML:<div id="calendar"><SELECT id=idYear></SELECT>年 <SELECT id=idMonth></SELECT>月 <SELECT id=idDay></SELECT>日</div>
 */
(function ($) {
    //SELECT控件设置函数
    function setSelectControl(oSelect, iStart, iLength, iIndex) {
        oSelect.empty();
        for (var i = 0; i < iLength; i++) {
            if ((parseInt(iStart) + i) == iIndex)
                oSelect.append("<option selected='selected' value='" + (parseInt(iStart) + i) + "'>" + (parseInt(iStart) + i) + "</option>");
            else
                oSelect.append("<option value='" + (parseInt(iStart) + i) + "'>" + (parseInt(iStart) + i) + "</option>");
        }
    }

    $.fn.DateSelector = function (options) {
        options = options || {};

        //初始化
        this._options = {
            ctlYearId: null,
            ctlMonthId: null,
            ctlDayId: null,
            defYear: 0,
            defMonth: 0,
            defDay: 0,
            minYear: 1882,
            maxYear: new Date().getFullYear()
        }

        for (var property in options) {
            this._options[property] = options[property];
        }

        this.yearValueId = $("#" + this._options.ctlYearId);
        this.monthValueId = $("#" + this._options.ctlMonthId);
        this.dayValueId = $("#" + this._options.ctlDayId);

        var dt = new Date(),
        iMonth = parseInt(this.monthValueId.attr("data") || this._options.defMonth),
        iDay = parseInt(this.dayValueId.attr("data") || this._options.defDay),
        iMinYear = parseInt(this._options.minYear),
        iMaxYear = parseInt(this._options.maxYear);

        this.Year = parseInt(this.yearValueId.attr("data") || this._options.defYear) || dt.getFullYear();
        this.Month = 1 <= iMonth && iMonth <= 12 ? iMonth : dt.getMonth() + 1;
        this.Day = iDay > 0 ? iDay : dt.getDate();
        this.minYear = iMinYear && iMinYear < this.Year ? iMinYear : this.Year;
        this.maxYear = iMaxYear && iMaxYear > this.Year ? iMaxYear : this.Year;

        //初始化控件
        //设置年
        setSelectControl(this.yearValueId, this.minYear, this.maxYear - this.minYear + 1, this.Year);
        //设置月
        setSelectControl(this.monthValueId, 1, 12, this.Month);
        //设置日
        var daysInMonth = new Date(this.Year, this.Month, 0).getDate(); //获取指定年月的当月天数[new Date(year, month, 0).getDate()]
        if (this.Day > daysInMonth) { this.Day = daysInMonth; };
        setSelectControl(this.dayValueId, 1, daysInMonth, this.Day);

        var oThis = this;
        //绑定控件事件
        this.yearValueId.change(function () {
            oThis.Year = $(this).val();
            setSelectControl(oThis.monthValueId, 1, 12, oThis.Month);
            oThis.monthValueId.change();
        });
        this.monthValueId.change(function () {
            oThis.Month = $(this).val();
            var daysInMonth = new Date(oThis.Year, oThis.Month, 0).getDate();
            if (oThis.Day > daysInMonth) { oThis.Day = daysInMonth; };
            setSelectControl(oThis.dayValueId, 1, daysInMonth, oThis.Day);
        });
        this.dayValueId.change(function () {
            oThis.Day = $(this).val();
        });
    }
})(jQuery);

demo.html

<!DOCTYPE html>
<html lang="zh-cn">
<head>
<meta charset="UTF-8">
<title>jQuery 多级联动下拉菜单</title>
</head>
<body>
<div id="dateSelector">
<select id="idYear" name="idYear" data=""></select>年 <select id="idMonth" name="idMonth" data="12"></select>月 <select id="idDay" name="idDay" data="1"></select>日
</div>
<script type="text/javascript" src="jquery-1.10.1.min.js"></script>
<script type="text/javascript" src="date.js"></script>
<script>
$(function(){
	var myDate = new Date();
	$("#dateSelector").DateSelector({
		ctlYearId: 'idYear',
		ctlMonthId: 'idMonth',
		ctlDayId: 'idDay',
		defYear: myDate.getFullYear(),
		defMonth: (myDate.getMonth()+1),
		defDay: myDate.getDate(),
		minYear: 1800,
		maxYear: (myDate.getFullYear()+1)
	});
});
</script>
</body>
</html>

效果图：

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