JavaScript实现的日期控件具体代码

  

复制代码 代码如下:

  <html>

  <head>

  <style>

  <!--

  .wr{font-size: 12pt; line-height: 22px}

  .wr1 {  FONT-SIZE: 12px; LINE-HEIGHT: 200%}

  .wr2 {  FONT-SIZE: 14px; LINE-HEIGHT: 200%}

  .wr3 {  FONT-SIZE: 12px}

  .wr4 {  FONT-SIZE: 12px; LINE-HEIGHT: 150%}

  // -->

  </style>

  <title>日期自动输入控件</title>

  <meta http-equiv="Content-Type" content="text/html; charset=gb2312">

  </head>

  <style type="text/css">

  .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>

  <script type="text/javascript">

  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" class="noborder hand" onclick="'+_this.n+'.update('+a+')">'+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" class="noborder">'+week[i]+'</td>');

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

  for (var i=0; i<D._fc(); i++ ) con.push('<td class="hand" onclick="'+this.n+'.fillInput('+year+', '+month+', '+(i+1)+')">'+(i+1)+'</td>');

  var toend = con.length%7;

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

  _html += '<tr>'+fn("-1, null", "<<")+fn("null, -1", "<")+'<td title="'+this.n+'DatePicker" colspan=3 class="strong">'+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>

  <body bgcolor="#FFFFDB" text="#000000" leftmargin="0" topmargin="0" marginwidth="0" marginheight="0">

  <form >

  <table border="0" width="60%" align="center">

  <tr>

  <td width="45%" class="wr4" align="right"> 生日:</td>

  <td width="55%" class="wr4">

  <input type="text" name="mtime" id="date-input">  <font color="RED">*</font>

  </td>

  </tr>

  <tr>

  <td width="45%" align="right"><input type = "submit" value = "确定"/></td>

  <td width="55%"><input type = "reset" value = "重置"/></td>

  </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