js日历（calendar）

效果还不错

// JavaScript Document

/*
    [Discuz!] (C)2001-2007 Comsenz Inc.
    This is NOT a freeware, use is subject to license terms

    $RCSfile: calendar.js,v $
    $Revision: 1.17 $
    $Date: 2007/06/15 13:53:53 $
*/

var controlid = null;
var currdate = null;
var startdate = null;
var enddate = null;
var yy = null;
var mm = null;
var hh = null;
var ii = null;
var currday = null;
var addtime = false;
var today = new Date();
var lastcheckedyear = false;
var lastcheckedmonth = false;

/*
以下有common.js中提取出来的与显示日历有关的
*/
var lang = new Array();
var userAgent = navigator.userAgent.toLowerCase();
var is_opera = userAgent.indexOf('opera') != -1 && opera.version();
var is_moz = (navigator.product == 'Gecko') && userAgent.substr(userAgent.indexOf('firefox') + 8, 3);
var is_ie = (userAgent.indexOf('msie') != -1 && !is_opera) && userAgent.substr(userAgent.indexOf('msie') + 5, 3);

function $(id) {
    return document.getElementById(id);
}

function doane(event) {
    e = event ? event : window.event;
    if(is_ie) {
        e.returnValue = false;
        e.cancelBubble = true;
    } else if(e) {
        e.stopPropagation();
        e.preventDefault();
    }
}
/*
以上有common.js中提取出来的与显示日历有关的
*/


function getposition(obj) {
    var r = new Array();
    r['x'] = obj.offsetLeft;
    r['y'] = obj.offsetTop;
    while(obj = obj.offsetParent) {
        r['x'] += obj.offsetLeft;
        r['y'] += obj.offsetTop;
    }
    return r;
}

function loadcalendar() {
    s = '';
    s += '<div id="calendar" style="display:none; position:absolute; z-index:9;" onclick="doane(event)">';
    s += '<div style=" 210px; border: 1px solid #FFF;"><table cellspacing="0" cellpadding="0" width="100%" style="text-align: center;">';
    s += '<tr align="center" id="calendar_week"><td><a href="###" onclick="refreshcalendar(yy, mm-1)" title="上一月">《</a></td><td colspan="5" style="text-align: center"><a href="###" onclick="showdiv(\'year\');doane(event)" class="dropmenu" title="点击选择年份" id="year"></a>&nbsp; - &nbsp;<a id="month" class="dropmenu" title="点击选择月份" href="###" onclick="showdiv(\'month\');doane(event)"></a></td><td><A href="###" onclick="refreshcalendar(yy, mm+1)" title="下一月">》</A></td></tr>';
    s += '<tr id="calendar_header"><td>日</td><td>一</td><td>二</td><td>三</td><td>四</td><td>五</td><td>六</td></tr>';
    for(var i = 0; i < 6; i++) {
        s += '<tr>';
        for(var j = 1; j <= 7; j++)
            s += "<td id=d" + (i * 7 + j) + " height=\"19\">0</td>";
        s += "</tr>";
    }
    s += '<tr id="hourminute"><td colspan="7" align="center"><input type="text" size="2" value="" id="hour" onKeyUp=\'this.value=this.value > 23 ? 23 : zerofill(this.value);controlid.value=controlid.value.replace(/\\d+(\:\\d+)/ig, this.value+"$1")\'> 点 <input type="text" size="2" value="" id="minute" onKeyUp=\'this.value=this.value > 59 ? 59 : zerofill(this.value);controlid.value=controlid.value.replace(/(\\d+\:)\\d+/ig, "$1"+this.value)\'> 分</td></tr>';
    s += '</table></div></div>';
    s += '<div id="calendar_year" onclick="doane(event)" style="display: none"><div class="col">';
    for(var k = 1930; k <= 2019; k++) {
        s += k != 1930 && k % 10 == 0 ? '</div><div class="col">' : '';
        s += '<a href="###" onclick="refreshcalendar(' + k + ', mm);$(\'calendar_year\').style.display=\'none\'"><span' + (today.getFullYear() == k ? ' class="calendar_today"' : '') + ' id="calendar_year_' + k + '">' + k + '</span></a><br />';
    }
    s += '</div></div>';
    s += '<div id="calendar_month" onclick="doane(event)" style="display: none">';
    for(var k = 1; k <= 12; k++) {
        s += '<a href="###" onclick="refreshcalendar(yy, ' + (k - 1) + ');$(\'calendar_month\').style.display=\'none\'"><span' + (today.getMonth()+1 == k ? ' class="calendar_today"' : '') + ' id="calendar_month_' + k + '">' + k + ( k < 10 ? '&nbsp;' : '') + ' 月</span></a><br />';
    }
    s += '</div>';
    if(is_ie && is_ie < 7) {
        s += '<iframe id="calendariframe" frameborder="0" style="display:none;position:absolute;filter:progid:DXImageTransform.Microsoft.Alpha(style=0,opacity=0)"></iframe>';
        s += '<iframe id="calendariframe_year" frameborder="0" style="display:none;position:absolute;filter:progid:DXImageTransform.Microsoft.Alpha(style=0,opacity=0)"></iframe>';
        s += '<iframe id="calendariframe_month" frameborder="0" style="display:none;position:absolute;filter:progid:DXImageTransform.Microsoft.Alpha(style=0,opacity=0)"></iframe>';
    }

/*========================================
*此处修改自动生成层
*修改:terry
*=================================*/
    var parentdiv=document.createElement('div');
    parentdiv.setAttribute('id','append_parent');
    document.body.appendChild(parentdiv);
    //alert($('append_parent').innerHTML);    
/*====================================修改结束============================*/    
    var div = document.createElement('div');
    div.innerHTML = s;
    $('append_parent').appendChild(div);
    document.onclick = function(event) {
        $('calendar').style.display = 'none';
        $('calendar_year').style.display = 'none';
        $('calendar_month').style.display = 'none';
        if(is_ie && is_ie < 7) {
            $('calendariframe').style.display = 'none';
            $('calendariframe_year').style.display = 'none';
            $('calendariframe_month').style.display = 'none';
        }
    }
    $('calendar').onclick = function(event) {
        doane(event);
        $('calendar_year').style.display = 'none';
        $('calendar_month').style.display = 'none';
        if(is_ie && is_ie < 7) {
            $('calendariframe_year').style.display = 'none';
            $('calendariframe_month').style.display = 'none';
        }
    }

}

function parsedate(s) {
    /(\d+)\-(\d+)\-(\d+)\s*(\d*):?(\d*)/.exec(s);
    var m1 = (RegExp.$1 && RegExp.$1 > 1899 && RegExp.$1 < 2101) ? parseFloat(RegExp.$1) : today.getFullYear();
    var m2 = (RegExp.$2 && (RegExp.$2 > 0 && RegExp.$2 < 13)) ? parseFloat(RegExp.$2) : today.getMonth() + 1;
    var m3 = (RegExp.$3 && (RegExp.$3 > 0 && RegExp.$3 < 32)) ? parseFloat(RegExp.$3) : today.getDate();
    var m4 = (RegExp.$4 && (RegExp.$4 > -1 && RegExp.$4 < 24)) ? parseFloat(RegExp.$4) : 0;
    var m5 = (RegExp.$5 && (RegExp.$5 > -1 && RegExp.$5 < 60)) ? parseFloat(RegExp.$5) : 0;
    /(\d+)\-(\d+)\-(\d+)\s*(\d*):?(\d*)/.exec("0000-00-00 00\:00");
    return new Date(m1, m2 - 1, m3, m4, m5);
}

function settime(d) {
    $('calendar').style.display = 'none';
    $('calendar_month').style.display = 'none';
    if(is_ie && is_ie < 7) {
        $('calendariframe').style.display = 'none';
    }
    controlid.value = yy + "-" + zerofill(mm + 1) + "-" + zerofill(d) + (addtime ? ' ' + zerofill($('hour').value) + ':' + zerofill($('minute').value) : '');
}

function showcalendar(event, controlid1, addtime1, startdate1, enddate1) {
    controlid = controlid1;
    addtime = addtime1;
    startdate = startdate1 ? parsedate(startdate1) : false;
    enddate = enddate1 ? parsedate(enddate1) : false;
    currday = controlid.value ? parsedate(controlid.value) : today;
    hh = currday.getHours();
    ii = currday.getMinutes();
    var p = getposition(controlid);
    $('calendar').style.display = 'block';
    $('calendar').style.left = p['x']+'px';
    $('calendar').style.top    = (p['y'] + 20)+'px';
    doane(event);
    refreshcalendar(currday.getFullYear(), currday.getMonth());
    if(lastcheckedyear != false) {
        $('calendar_year_' + lastcheckedyear).className = 'calendar_default';
        $('calendar_year_' + today.getFullYear()).className = 'calendar_today';
    }
    if(lastcheckedmonth != false) {
        $('calendar_month_' + lastcheckedmonth).className = 'calendar_default';
        $('calendar_month_' + (today.getMonth() + 1)).className = 'calendar_today';
    }
    $('calendar_year_' + currday.getFullYear()).className = 'calendar_checked';
    $('calendar_month_' + (currday.getMonth() + 1)).className = 'calendar_checked';
    $('hourminute').style.display = addtime ? '' : 'none';
    lastcheckedyear = currday.getFullYear();
    lastcheckedmonth = currday.getMonth() + 1;
    if(is_ie && is_ie < 7) {
        $('calendariframe').style.top = $('calendar').style.top;
        $('calendariframe').style.left = $('calendar').style.left;
        $('calendariframe').style.width = $('calendar').offsetWidth;
        $('calendariframe').style.height = $('calendar').offsetHeight;
        $('calendariframe').style.display = 'block';
    }
}

function refreshcalendar(y, m) {
    var x = new Date(y, m, 1);
    var mv = x.getDay();
    var d = x.getDate();
    var dd = null;
    yy = x.getFullYear();
    mm = x.getMonth();
    $("year").innerHTML = yy;
    $("month").innerHTML = mm + 1 > 9 ? (mm + 1) : '0' + (mm + 1);

    for(var i = 1; i <= mv; i++) {
        dd = $("d" + i);
        dd.innerHTML = "&nbsp;";
        dd.className = "";
    }

    while(x.getMonth() == mm) {
        dd = $("d" + (d + mv));
        dd.innerHTML = '<a href="###" onclick="settime(' + d + ');return false">' + d + '</a>';
        if(x.getTime() < today.getTime() || (enddate && x.getTime() > enddate.getTime()) || (startdate && x.getTime() < startdate.getTime())) {
            dd.className = 'calendar_expire';
        } else {
            dd.className = 'calendar_default';
        }
        if(x.getFullYear() == today.getFullYear() && x.getMonth() == today.getMonth() && x.getDate() == today.getDate()) {
            dd.className = 'calendar_today';
            dd.firstChild.title = '今天';
        }
        if(x.getFullYear() == currday.getFullYear() && x.getMonth() == currday.getMonth() && x.getDate() == currday.getDate()) {
            dd.className = 'calendar_checked';
        }
        x.setDate(++d);
    }

    while(d + mv <= 42) {
        dd = $("d" + (d + mv));
        dd.innerHTML = "&nbsp;";
        d++;
    }

    if(addtime) {
        $('hour').value = zerofill(hh);
        $('minute').value = zerofill(ii);
    }
}

function showdiv(id) {
    var p = getposition($(id));
    $('calendar_' + id).style.left = p['x']+'px';
    $('calendar_' + id).style.top = (p['y'] + 16)+'px';
    $('calendar_' + id).style.display = 'block';
    if(is_ie && is_ie < 7) {
        $('calendariframe_' + id).style.top = $('calendar_' + id).style.top;
        $('calendariframe_' + id).style.left = $('calendar_' + id).style.left;
        $('calendariframe_' + id).style.width = $('calendar_' + id).offsetWidth;
        $('calendariframe_' + id ).style.height = $('calendar_' + id).offsetHeight;
        $('calendariframe_' + id).style.display = 'block';
    }
}

function zerofill(s) {
    var s = parseFloat(s.toString().replace(/(^[\s0]+)|(\s+$)/g, ''));
    s = isNaN(s) ? 0 : s;
    return (s < 10 ? '0' : '') + s.toString();
}

/*  加载样式  */
var calendarstyle = "td{ color: #000; font: 12px/1.6em Helvetica, Arial, sans-serif; }a { color: #000; text-decoration: none; }a:hover { text-decoration: underline; }#calendar { border: 1px solid #9DB3C5; background: #F5FAFE; margin-bottom: 0.8em;}#calendar td { padding: 2px; font-weight: bold;}#calendar_week td { height: 2em; line-height: 2em; border-bottom: 1px solid #CAD9EA;}#hourminute td {padding: 4px 2px; border-top: 1px solid #CAD9EA;}.calendar_expire, .calendar_expire a:link, .calendar_expire a:visited {    color: #666; font-weight: normal; }.calendar_default, .calendar_default a:link, .calendar_default a:visited { color: #069;}.calendar_checked, .calendar_checked a:link, .calendar_checked a:visited { color: #090; font-weight: bold;}td.calendar_checked, span.calendar_checked{ background: #CAD9EA;}.calendar_today, .calendar_today a:link, .calendar_today a:visited { color: #000; font-weight: bold; }#calendar_header td{  30px; height: 20px; border-bottom: 1px solid #CAD9EA; font-weight: normal; }#calendar_year { display: none;    line-height: 130%; background: #F5FAFE; position: absolute; z-index: 10; }#calendar_year .col { float: left; background: #F5FAFE; margin-left: 1px; border: 1px solid #CAD9EA; padding: 4px; }#calendar_month { display: none; background: #F5FAFE; line-height: 130%; border: 1px solid #DDD; padding: 4px; position: absolute; z-index: 11; }";
if(is_ie){// IE
    var el = document.createStyleSheet();
    el.cssText = calendarstyle;
} else {
    var el = document.createElement("style");
    el.type = "text/css";
    el.appendChild(document.createTextNode(calendarstyle));
    document.getElementsByTagName("head")[0].appendChild(el);
}

loadcalendar();

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head>
<body>
<script type="text/javascript" src="calendar.js"></script>
第一种情况：带时间<br />
<input onClick="showcalendar(event, this, true)"   type="text" name="time" id="time" size="15" value="" />
<br /><br />第二种情况，不带时间<br />
<input onClick="showcalendar(event, this, false)" type="text" name="time1" id="time1" size="15" value="" />
</body>
</html>