JavaScript实现的日期控件具体代码_Javascript教程-查字典教程网

复制代码代码如下:

<html>

<head>

<style>

</style>

<title>日期自动输入控件</title>

</head>

.date-picker-wp {

display: none;

position: absolute;

background: #f1f1f1;

left: 40px;

top: 40px;

border-top: 4px solid #3879d9;

}

.date-picker-wp table {

border: 1px solid #ddd;

}

.date-picker-wp td {

background: #fafafa;

width: 22px;

height: 18px;

border: 1px solid #ccc;

font-size: 12px;

text-align: center;

}

.date-picker-wp td.noborder {

border: none;

background: none;

}

.date-picker-wp td a {

color: #1c93c4;

text-decoration: none;

}

.strong {font-weight: bold}

.hand {cursor: pointer; color: #3879d9}

</style>

var DatePicker = function () {

var $ = function (i)

{

return document.getElementById(i)

addEvent = function (o, e, f) {o.addEventListener ? o.addEventListener(e, f, false) : o.attachEvent('on'+e, function(){f.call(o)})},

getPos = function (el) {

for (var pos = {x:0, y:0}; el; el = el.offsetParent) {

pos.x += el.offsetLeft;

pos.y += el.offsetTop;

}

return pos;

};

var init = function (n, config) {

window[n] = this;

Date.prototype._fd = function () {var d = new Date(this); d.setDate(1); return d.getDay()};

Date.prototype._fc = function () {var d1 = new Date(this), d2 = new Date(this); d1.setDate(1); d2.setDate(1); d2.setMonth(d2.getMonth()+1); return (d2-d1)/86400000;};

this.n = n;

this.config = config;

this.D = new Date;

this.el = $(config.inputId);

this.el.title = this.n+'DatePicker';

this.update();

this.bind();

};

init.prototype = {

update : function (y, m) {

var con = [], week = ['Su','Mo','Tu','We','Th','Fr','Sa'], D = this.D, _this = this;

fn = function (a, b) {return '<td title="'+_this.n+'DatePicker">'+b+'</td>'},

_html = '<table cellpadding=0 cellspacing=2>';

y && D.setYear(D.getFullYear() + y);

m && D.setMonth(D.getMonth() + m);

var year = D.getFullYear(), month = D.getMonth() + 1, date = D.getDate();

for (var i=0; i<week.length; i++) con.push('<td title="'+this.n+'DatePicker">'+week[i]+'</td>');

for (var i=0; i<D._fd(); i++ ) con.push('<td title="'+this.n+'DatePicker"> </td>');

for (var i=0; i<D._fc(); i++ ) con.push('<td>'+(i+1)+'</td>');

var toend = con.length%7;

if (toend != 0) for (var i=0; i<7-toend; i++) con.push('<td> </td>');

_html += '<tr>'+fn("-1, null", "<<")+fn("null, -1", "<")+'<td title="'+this.n+'DatePicker" colspan=3>'+year+'/'+month+'/'+date+'</td>'+fn("null, 1", ">")+fn("1, null", ">>")+'</tr>';

for (var i=0; i<con.length; i++) _html += (i==0 ? '<tr>' : i%7==0 ? '</tr><tr>' : '') + con[i] + (i == con.length-1 ? '</tr>' : '');

!!this.box ? this.box.innerHTML = _html : this.createBox(_html);

fillInput : function (y, m, d) {

var s = this.config.seprator || '/';

this.el.value = y + s + m + s + d;

this.box.style.display = 'none';

show : function () {

var s = this.box.style, is = this.mask.style;

s['left'] = is['left'] = getPos(this.el).x + 'px';

s['top'] = is['top'] = getPos(this.el).y + this.el.offsetHeight + 'px';

s['display'] = is['display'] = 'block';

is['width'] = this.box.offsetWidth - 2 + 'px';

is['height'] = this.box.offsetHeight - 2 + 'px';

hide : function () {

this.box.style.display = 'none';

this.mask.style.display = 'none';

bind : function () {

var _this = this;

addEvent(document, 'click', function (e) {

e = e || window.event;

var t = e.target || e.srcElement;

if (t.title != _this.n+'DatePicker') {_this.hide()} else {_this.show()}

});

createBox : function (html) {

var box = this.box = document.createElement('div'), mask = this.mask = document.createElement('iframe');

box.className = this.config.className || 'datepicker';

mask.src = 'javascript:false';

mask.frameBorder = 0;

box.style.cssText = 'position:absolute;display:none;z-index:9999';

mask.style.cssText = 'position:absolute;display:none;z-index:9998';

box.title = this.n+'DatePicker';

box.innerHTML = html;

document.body.appendChild(box);

document.body.appendChild(mask);

return box;

}

};

return init;

}();

onload = function () {

new DatePicker('_DatePicker_demo', {

inputId: 'date-input',

className: 'date-picker-wp',

seprator: '-'

});

}

</script>

<form >

<tr>

</td>

</tr>

<tr>

</tr>

</table>

</form>

</body>

</html>

html页面中的js执行顺序：

1）在head标签内的最先执行

2）在body标签内的执行

3）当在 body标签中加了 onload 事件时对应的 js 最后执行，也就是当页面加载完在执行

注意：当在 body标签中加了 onload 事件时在head标签内，所引用外部的 js 不起作用，当换成在body 内部或</html>之上引用外部js时可正常引用