calendar.js

一个简单的下拉式日期选择控件源码,如有不好之处可自行更改,完善

				cell.disabled = true;
				cell = cell.nextSibling;
				continue;
			}
			cell.disabled = false;
			cell.firstChild.data = iday;
			if (typeof this.checkDisabled == "function") {
				date.setDate(iday);
				if (this.checkDisabled(date)) {
					cell.className += " disabled";
					cell.disabled = true;
				}
			}
			if (!cell.disabled) {
				ar_days[ar_days.length] = cell;
				cell.caldate = iday;
				cell.ttip = "_";
				if (iday == mday) {
					cell.className += " selected";
					this.currentDateEl = cell;
				}
				if (hasToday && (iday == todayDate)) {
					cell.className += " today";
					cell.ttip += Calendar._TT["PART_TODAY"];
				}
				if (wday == SAT || wday == SUN) {
					cell.className += " weekend";
				}
			}
			++iday;
			((++wday) ^ 7) || (wday = 0);
			cell = cell.nextSibling;
		}
		row = row.nextSibling;
	}
	this.ar_days = ar_days;
	//此处做一些判断
	if(!ChinaDateFlg)
		this.title.firstChild.data = Calendar._MN[month] + ", " +year;
	else
		this.title.firstChild.data = Calendar._MN[month] + ", 民国" + (year-1911);
		//noClickFlg=false;
	// PROFILE
	// this.tooltips.firstChild.data = "Generated in " + ((new Date()) - today) + " ms";
};

/**
 *  Calls _init function above for going to a certain date (but only if the
 *  date is different than the currently selected one).
 */
Calendar.prototype.setDate = function (date) {
	if (!date.equalsTo(this.date)) {
		if(!ChinaDateFlg)
			this._init(this.mondayFirst, date);
		else
		{
			if(FirstOpenFlg)
			{
				date.setYear(date.getFullYear()+11);
				FirstOpenFlg=false;
			}
			this._init(this.mondayFirst, date);
		}
	}
};

/** Modifies the "mondayFirst" parameter (EU/US style). */

Calendar.prototype.setMondayFirst = function (mondayFirst) {
	this._init(mondayFirst, this.date);
	this._displayWeekdays();
};

/**
 *  Allows customization of what dates are enabled.  The "unaryFunction"
 *  parameter must be a function object that receives the date (as a JS Date
 *  object) and returns a boolean value.  If the returned value is true then
 *  the passed date will be marked as disabled.
 */
Calendar.prototype.setDisabledHandler = function (unaryFunction) {
	this.checkDisabled = unaryFunction;
};

/** Customization of allowed year range for the calendar. */
Calendar.prototype.setRange = function (a, z) {
	this.minYear = a;
	this.maxYear = z;
};

/** Calls the first user handler (selectedHandler). */
Calendar.prototype.callHandler = function () {
	if (this.onSelected) {
		if(!ChinaDateFlg)
			this.onSelected(this, this.date.print(this.dateFormat));		
		else
		{
			var strD=(this.date.getFullYear()-1911)+"/"+(this.date.getMonth()+1)+"/"+this.date.getDate();
			this.onSelected(this, strD);
		}
	}
};

/** Calls the second user handler (closeHandler). */
Calendar.prototype.callCloseHandler = function () {
	if (this.onClose) {
		FirstOpenFlg=true;
		this.onClose(this);
	}
	this.hideShowCovered();
};

/** Removes the calendar object from the DOM tree and destroys it. */
Calendar.prototype.destroy = function () {
	var el = this.element.parentNode;
	el.removeChild(this.element);
	Calendar._C = null;
	delete el;
};

/**
 *  Moves the calendar element to a different section in the DOM tree (changes
 *  its parent).
 */
Calendar.prototype.reparent = function (new_parent) {
	var el = this.element;
	el.parentNode.removeChild(el);
	new_parent.appendChild(el);
};

// This gets called when the user presses a mouse button anywhere in the
// document, if the calendar is shown.  If the click was outside the open
// calendar this function closes it.
Calendar._checkCalendar = function(ev) {
	if (!window.calendar) {
		return false;
	}
	var el = Calendar.is_ie ? Calendar.getElement(ev) : Calendar.getTargetElement(ev);
	for (; el != null && el != calendar.element; el = el.parentNode);
	if (el == null) {
		// calls closeHandler which should hide the calendar.
		window.calendar.callCloseHandler();
		Calendar.stopEvent(ev);
	}
};

/** Shows the calendar. */
Calendar.prototype.show = function () {
	var rows = this.table.getElementsByTagName("tr");
	for (var i = rows.length; i > 0;) {
		var row = rows[--i];
		Calendar.removeClass(row, "rowhilite");
		var cells = row.getElementsByTagName("td");
		for (var j = cells.length; j > 0;) {
			var cell = cells[--j];
			Calendar.removeClass(cell, "hilite");
			Calendar.removeClass(cell, "active");
		}
	}
	this.table.width = '150px';
	this.table.height = '150px';
	this.element.style.display = "block";
	this.hidden = false;
	if (this.isPopup) {
		window.calendar = this;
		Calendar.addEvent(document, "keydown", Calendar._keyEvent);
		Calendar.addEvent(document, "keypress", Calendar._keyEvent);
		Calendar.addEvent(document, "mousedown", Calendar._checkCalendar);
	}
	this.hideShowCovered();
};

/**
 *  Hides the calendar.  Also removes any "hilite" from the class of any TD
 *  element.
 */
Calendar.prototype.hide = function () {
	if (this.isPopup) {
		Calendar.removeEvent(document, "keydown", Calendar._keyEvent);
		Calendar.removeEvent(document, "keypress", Calendar._keyEvent);
		Calendar.removeEvent(document, "mousedown", Calendar._checkCalendar);
	}
	this.element.style.display = "none";
	this.hidden = true;
	this.hideShowCovered();
};

/**
 *  Shows the calendar at a given absolute position (beware that, depending on
 *  the calendar element style -- position property -- this might be relative
 *  to the parent's containing rectangle).
 */
Calendar.prototype.showAt = function (x, y) {
	var s = this.element.style;
	s.left = x + "px";
	s.top = y + "px";
	this.show();
};

/** Shows the calendar near a given element. */
Calendar.prototype.showAtElement = function (el) {
	var p = Calendar.getAbsolutePos(el);

   //Modify By Joe 2003/11/11
   //避免小月历的位置跑到画面外, 所以多加判断scroll的位子
   //this.showAt(p.x, p.y + el.offsetHeight);
   
	if (p.y + el.offsetHeight + 170 > document.body.scrollHeight && document.body.scrollHeight > 600 ){
	   this.showAt(p.x, p.y - el.offsetHeight - 170);
	}else{
	   this.showAt(p.x, p.y + el.offsetHeight);
	}
	
	//Modify By Joe 2003/11/11 End
	
};

/** Customizes the date format. */
Calendar.prototype.setDateFormat = function (str) {
	this.dateFormat = str;
};

/** Customizes the tooltip date format. */
Calendar.prototype.setTtDateFormat = function (str) {
	this.ttDateFormat = str;
};

/**
 *  Tries to identify the date represented in a string.  If successful it also
 *  calls this.setDate which moves the calendar to the given date.
 */
Calendar.prototype.parseDate = function (str, fmt) {
	var y = 0;
	var m = -1;
	var d = 0;
	var a = str.split(/\W+/);
	if (!fmt) {
		fmt = this.dateFormat;
	}
	var b = fmt.split(/\W+/);
	var i = 0, j = 0;
	for (i = 0; i < a.length; ++i) {
		if (b[i] == "D" || b[i] == "DD") {
			continue;
		}
		if (b[i] == "d" || b[i] == "dd") {
			d = parseInt(a[i]);
		}
		if (b[i] == "m" || b[i] == "mm") {
			m = parseInt(a[i]) - 1;
		}
		if (b[i] == "y") {
			y = parseInt(a[i]);
		}
		if (b[i] == "yy") {
			y = parseInt(a[i]) + 1900;
		}
		if (b[i] == "M" || b[i] == "MM") {
			for (j = 0; j < 12; ++j) {
				if (Calendar._MN[j].substr(0, a[i].length).toLowerCase() == a[i].toLowerCase()) { m = j; break; }
			}
		}
	}
	if (y != 0 && m != -1 && d != 0) {
		this.setDate(new Date(y, m, d));
		return;
	}
	y = 0; m = -1; d = 0;
	for (i = 0; i < a.length; ++i) {
		if (a[i].search(/[a-zA-Z]+/) != -1) {
			var t = -1;
			for (j = 0; j < 12; ++j) {
				if (Calendar._MN[j].substr(0, a[i].length).toLowerCase() == a[i].toLowerCase()) { t = j; break; }
			}
			if (t != -1) {
				if (m != -1) {
					d = m+1;
				}
				m = t;
			}
		} else if (parseInt(a[i]) <= 12 && m == -1) {
			m = a[i]-1;
		} else if (parseInt(a[i]) > 31 && y == 0) {
			y = a[i];
		} else if (d == 0) {
			d = a[i];
		}
	}
	if (y == 0) {
		var today = new Date();
		y = today.getFullYear();
	}
	if (m != -1 && d != 0) {
		this.setDate(new Date(y, m, d));
	}
};

Calendar.prototype.hideShowCovered = function () {
	var tags = new Array("applet", "iframe", "select");
	var el = this.element;

	var p = Calendar.getAbsolutePos(el);
	var EX1 = p.x;
	var EX2 = el.offsetWidth + EX1;
	var EY1 = p.y;
	var EY2 = el.offsetHeight + EY1;

	for (var k = tags.length; k > 0; ) {
		var ar = document.getElementsByTagName(tags[--k]);
		var cc = null;

		for (var i = ar.length; i > 0;) {
			cc = ar[--i];

			p = Calendar.getAbsolutePos(cc);
			var CX1 = p.x;
			var CX2 = cc.offsetWidth + CX1;
			var CY1 = p.y;
			var CY2 = cc.offsetHeight + CY1;

			if (this.hidden || (CX1 > EX2) || (CX2 < EX1) || (CY1 > EY2) || (CY2 < EY1)) {
				cc.style.visibility = "visible";
			} else {
				cc.style.visibility = "hidden";
			}
		}
	}
};

/** Internal function; it displays the bar with the names of the weekday. */
Calendar.prototype._displayWeekdays = function () {
	var MON = this.mondayFirst ? 0 : 1;
	var SUN = this.mondayFirst ? 6 : 0;
	var SAT = this.mondayFirst ? 5 : 6;
	var cell = this.firstdayname;
	for (var i = 0; i < 7; ++i) {
		cell.className = "day name";
		if (!i) {
			cell.ttip = this.mondayFirst ? Calendar._TT["SUN_FIRST"] : Calendar._TT["MON_FIRST"];
			cell.navtype = 100;
			cell.calendar = this;
			Calendar._add_evs(cell);
		}
		if (i == SUN || i == SAT) {
			Calendar.addClass(cell, "weekend");
		}
		cell.firstChild.data = Calendar._DN3[i + 1 - MON];
		cell = cell.nextSibling;
	}
};

/** Internal function.  Hides all combo boxes that might be displayed. */
Calendar.prototype._hideCombos = function () {
	this.monthsCombo.style.display = "none";
	this.yearsCombo.style.display = "none";
};

/** Internal function.  Starts dragging the element. */
Calendar.prototype._dragStart = function (ev) {
	if (this.dragging) {
		return;
	}
	this.dragging = true;
	var posX;
	var posY;
	if (Calendar.is_ie) {
		posY = window.event.clientY + document.body.scrollTop;
		posX = window.event.clientX + document.body.scrollLeft;
	} else {
		posY = ev.clientY + window.scrollY;
		posX = ev.clientX + window.scrollX;
	}
	var st = this.element.style;
	this.xOffs = posX - parseInt(st.left);
	this.yOffs = posY - parseInt(st.top);
	with (Calendar) {
		addEvent(document, "mousemove", calDragIt);
		addEvent(document, "mouseover", stopEvent);
		addEvent(document, "mouseup", calDragEnd);
	}
};

// BEGIN: DATE OBJECT PATCHES

/** Adds the number of days array to the Date object. */
Date._MD = new Array(31,28,31,30,31,30,31,31,30,31,30,31);

/** Constants used for time computations */
Date.SECOND = 1000 /* milliseconds */;
Date.MINUTE = 60 * Date.SECOND;
Date.HOUR   = 60 * Date.MINUTE;
Date.DAY    = 24 * Date.HOUR;
Date.WEEK   =  7 * Date.DAY;

/** Returns the number of days in the current month */
Date.prototype.getMonthDays = function(month) {
	var year = this.getFullYear();
	if (typeof month == "undefined") {
		month = this.getMonth();
	}
	if (((0 == (year%4)) && ( (0 != (year%100)) || (0 == (year%400)))) && month == 1) {
		return 29;
	} else {
		return Date._MD[month];
	}
};

/** Returns the number of the week.  The algorithm was "stolen" from PPK's
 * website, hope it's correct :) http://www.xs4all.nl/~ppk/js/week.html */
Date.prototype.getWeekNumber = function() {
	var now = new Date(this.getFullYear(), this.getMonth(), this.getDate(), 0, 0, 0);
	var then = new Date(this.getFullYear(), 0, 1, 0, 0, 0);
	var time = now - then;
	var day = then.getDay();
	(day > 3) && (day -= 4) || (day += 3);
	return Math.round(((time / Date.DAY) + day) / 7);
};

/** Checks dates equality (ignores time) */
Date.prototype.equalsTo = function(date) {
	return ((this.getFullYear() == date.getFullYear()) &&
		(this.getMonth() == date.getMonth()) &&
		(this.getDate() == date.getDate()));
};

/** Prints the date in a string according to the given format. */
Date.prototype.print = function (frm) {
	var str = new String(frm);
	var m = this.getMonth();
	var d = this.getDate();
	var y = this.getFullYear();
	var wn = this.getWeekNumber();
	var w = this.getDay();
	var s = new Array();
	s["d"] = d;
	s["dd"] = (d < 10) ? ("0" + d) : d;
	s["m"] = 1+m;
	s["mm"] = (m < 9) ? ("0" + (1+m)) : (1+m);