javascript 日期联动选择器 [其中的一些代码值得学习]_时间日期

<title> DateSelector </title> <style> body { margin: 0px; padding: 0px; font-size: 12px; } #year, #month, #date{ width: 60px; margin-right: 3px; } </style> <script> var $ = function(id) { return 'string' == typeof id ? document.getElementById(id) : id; }; var Extend = function(destination, source) { for(var pro in source) { destination[pro] = source[pro]; } return destination; } var addEvent = function(obj, type, fn) { if(obj.addEventListener) { obj.addEventListener(type, fn, false); return true; }else if(obj.attachEvent) { obj['e'+type+fn] = fn; obj[type+fn] = function(){ obj['e'+type+fn](window.event); } obj.attachEvent('on'+type, obj[type+fn]); return true; } return false; } /*! * DateSelector * * Copyright (c) 2009 GoodNess2010 * Date: 2009-12-15 (星期二) */ function DateSelector(idYear, idMonth, idDate, options) { var D = new Date(); this.year = $(idYear); this.month = $(idMonth); this.date = $(idDate); this.nowYear = D.getFullYear(); this.nowMonth = D.getMonth() + 1; this.nowDate = D.getDate(); Extend(this, this.setOptions(options)); }; DateSelector.prototype = { setOptions: function(options){ // 默认项 this.options = { floorYear: 5, // 距当前年份前5年 ceilYear: 7, // 距当前年份后7年 onStart: function(){}, // 前置事件 onEnd: function(){} // 结束事件 }; return Extend(this.options, options || {}); }, createOption: function(container, start, end, sign){ sign = sign || start; var _num = parseInt(end-start+1, 10); container.options.length = _num; for(var i = 0; i < _num; i++) { container.options[i].text = container.options[i].value = start + i; } container.selectedIndex = (sign-start >= _num ? _num-1 : sign-start); }, getDate: function(y, m){ return new Date(y, m, 0).getDate(); }, getSelText: function(sel) { return sel.options[sel.selectedIndex].text; }, changeDate: function(bindO){ var _this = this; addEvent(bindO, 'change', function(){ var y = _this.getSelText(_this.year), m = _this.getSelText(_this.month), d = _this.getSelText(_this.date); _this.createOption(_this.date, 1, _this.getDate(y, m), d); _this.onEnd(); }); }, bindEvents: function(){ var _this = this; this.changeDate(this.year); this.changeDate(this.month); addEvent(this.date, 'change', function(){ _this.onEnd(); }); }, init: function(){ var _startYear = parseInt(this.nowYear - this.floorYear, 10); var _endYear = parseInt(this.nowYear + this.ceilYear, 10); var _endDate = this.getDate(this.nowYear, this.nowMonth, 0); this.createOption(this.year, _startYear, _endYear, this.nowYear); this.createOption(this.month, 1, 12, this.nowMonth); this.createOption(this.date, 1, _endDate, this.nowDate); this.bindEvents(); this.onStart(); } }; </script> <select id="year"></select><select id="month"></select><select id="date"></select> <span id="info"></span> <script> var dateSelector = new DateSelector('year', 'month', 'date', {floorYear: 1}); dateSelector.onStart = dateSelector.onEnd = function(){ $('info').innerHTML = this.getSelText(this.year) + '年' + ('0' + this.getSelText(this.month)).slice(-2) + '月' + ('0' + this.getSelText(this.date)).slice(-2) + '日'; } dateSelector.init(); </script>
[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]

[参数说明]

复制代码 代码如下:

var dateSelector = new DateSelector(年下拉ID, 月下拉ID, 日下拉ID, {floorYear: 向前几年, ceilYear: 向后几年});
dateSelector.onStart = dateSelector.onEnd = function(){ // 自定义开始结束事件
$('info').innerHTML = this.getSelText(this.year) + '年' +
('0' + this.getSelText(this.month)).slice(-2) + '月' +
('0' + this.getSelText(this.date)).slice(-2) + '日';
}
dateSelector.init(); // 初始化开始

[说明文字]

这里生成option的方法选择了中规中矩的options[i].text = options[i].value = i;

期间用过一个这个方法:

container.options[container.options.length] = new Option(i, i, false, (i == sign ? true : false))
这个new Option有4个参数可用(text, value, defaultSelected, selected); 最后一个参数可以设置选中.

但一直没有查到官方资料. 在IE6中也遇到了BUG.大家有用过的请指正.

BUG演示

这个在IE7,IE8,FF3等都没问题.但在IE6就会选中的是前一个.现在还未知原因. (经过确认好像是IE Tester的问题.那么下面这个方案也是个简洁的生成option方案)


测试代码:

复制代码 代码如下: