//日期
var ie = /*@cc_on!@*/false, co = null, io = '';

var config = { dir: '', skin: 'default' }

var $ = function(id) {
    return 'string' == typeof (id) ? document.getElementById(id) : id;
}

String.prototype.trim = function() {
    return this.replace(/(^\s*)|(\s*$)/g, '');
}

function getet() {
    if (ie) return window.event;
    var func = getet.caller;
    while (func != null) {
        var arg = func.arguments[0];
        if (arg && (arg + '').indexOf('Event') >= 0) return arg;
        func = func.caller;
    }
    return null;
}

function getpos(o) {
    var l, t;

    if (o.getBoundingClientRect) {
        var el = o.getBoundingClientRect();
        var st = Math.max(document.documentElement.scrollTop, document.body.scrollTop);
        var sl = Math.max(document.documentElement.scrollLeft, document.body.scrollLeft);
        l = sl + el.left; t = st + el.top;
    }
    else {
        l = o.offsetLeft; t = o.offsetTop;
        while (o = o.offsetParent) {
            l += o.offsetLeft; t += o.offsetTop;
        }
    }

    return { x: l, y: t };
}

var calendar = function(s) {
    var d = new Date();

    if (s && s.indexOf('-') >= 0) {
        var a = s.trim().split('-');
        d = new Date(a[0], a[1] - 1, a[2]);
    }

    this.y = d.getFullYear();
    this.m = d.getMonth() + 1;
    this.d = d.getDate();
}

calendar.prototype =
{
    draw: function() {
        var a = [], h = '', w = ['日', '一', '二', '三', '四', '五', '六'];
        var fd = new Date(this.y, this.m - 1, 1).getDay();
        var md = new Date(this.y, this.m, 0).getDate();

        for (var i = 1; i <= fd; i++) a.push(0);
        for (var i = 1; i <= md; i++) a.push(i);

        h += '<div id="containchild"><table cellspacing="0" cellpadding="0" id="calendar">' +
		     '<caption><div id="py" onclick="co.py();"><img height="1"/></div><div id="pm" onclick="co.pm();"><img height="1"/></div><span>' + this.y + ' 年 ' + this.m + ' 月</span><div id="nm" onclick="co.nm();"><img height="1"/></div><div id="ny" onclick="co.ny();"><img height="1"/></div></caption>' +
		     '<thead><tr>';

        for (var i = 0; i < 7; i++)
            h += '<td>' + w[i] + '</td>';

        h += '</tr></thead><tbody>';

        while (a.length) {
            h += '<tr>';
            for (var i = 1; i <= 7; i++) {
                if (a.length) {
                    var d = a.shift();
                    if (d) {
                        h += '<td onmouseover="lhgcalendar_over(this)" onmouseout="lhgcalendar_out(this)"';
                        if (d == this.d) h += ' class="tday" '; else h += ' class="tdday" ';
                        h += 'onclick="co.setdate(this);">' + d + '</td>';
                    } else h += '<td>&nbsp;</td>';
                }
            }
            h += '</tr>';
        }

        h += '</tbody></table></div>';
        return h;
    },

    crte: function() {
        this.hide();
        var contain = document.createElement('div');
        var s = contain.style;
        s.visibility = 'hidden';
        s.position = 'absolute';
        s.top = '0px'; s.zIndex = 65530;
        contain.innerHTML = this.draw();
        contain.id = 'container';
        document.body.appendChild(contain);

        if (ie) {
            var ifm = document.createElement('iframe');
            var s = ifm.style;
            ifm.frameBorder = 0;
            ifm.height = (contain.clientHeight - 3) + 'px';
            s.visibility = 'inherit'; s.zIndex = -1;
            s.filter = 'alpha(opacity=0)';
            s.position = 'absolute'; s.top = '0px'; s.left = '0px';
            s.width = $('container').offsetWidth;
            contain.insertAdjacentElement('afterBegin', ifm);
        }
    },

    hide: function() {
        if ($('container')) { document.body.removeChild($('container')); }
        var co = null;
    },

    py: function() {
        this.predraw(new Date(this.y - 1, this.m - 1, 1));
    },

    ny: function() {
        this.predraw(new Date(this.y + 1, this.m - 1, 1));
    },

    pm: function() {
        this.predraw(new Date(this.y, this.m - 2, 1));
    },

    nm: function() {
        this.predraw(new Date(this.y, this.m, 1));
    },

    predraw: function(d) {
        this.y = d.getFullYear(); this.m = d.getMonth() + 1;
        $('containchild').innerHTML = this.draw();
    },

    setdate: function(o) {
        if ($(io)) $(io).value = this.y + '-' + this.m + '-' + o.innerHTML;
        this.hide();
    }
};

function lhgcalendar(id) {
    var evt = getet();
    var e = evt.srcElement || evt.target;

    var d = id ? $(id).value : e.value;
    io = id ? id : e.id;

    var c = new calendar(d); co = c; c.crte();

    var pos = getpos(e);
    var l, t, w = e.offsetWidth, h = e.offsetHeight;

    if (config.dir == 'right') {
        l = pos.x + w; t = pos.y;
        l = ie ? l : l + 2; t = ie ? t - 2 : t;
    }
    else {
        l = pos.x; t = pos.y + h;
        l = ie ? l - 2 : l; t = ie ? t - 1 : t + 1;
    }

    var o = $('container');
    o.style.top = t - 186 + 'px';
    o.style.left = l + 'px';
    o.style.visibility = 'visible';

    if (ie) {
        document.attachEvent('onclick', c.hide);
        o.attachEvent('onclick', function(e) { e.cancelBubble = true; });
    }
    else {
        document.addEventListener('click', c.hide, false);
        o.addEventListener('click', function(e) { e.cancelBubble = true; }, false);
    }

    evt.cancelBubble = true;
}

function lhgcalendar_over(o) {
    if (o.className != 'tday') o.className = 'over';
}

function lhgcalendar_out(o) {
    if (o.className != 'tday') o.className = 'tdday';
}

(function() {
    var l = document.createElement('link');
    l.type = 'text/css';
    l.href = 'skin/' + config.skin + '.css';
    l.rel = 'stylesheet';
    document.getElementsByTagName('head')[0].appendChild(l);
})();