/**
* Filename.......: calendar.js
* Project........: Popup Calendar
* Last Modified..: $Date$
* CVS Revision...: $Revision$
* Copyright......: 2001, 2002 Richard Heyes
*/
	dynCalendar_layers          = new Array();
	dynCalendar_mouseoverStatus = true;
	dynCalendar_mouseX          = 0;
	dynCalendar_mouseY          = 0;

/**
* The calendar constructor
*
* @access public
* @param string objName      Name of the object that you create
* @param string callbackFunc Name of the callback function
* @param string OPTIONAL     Optional layer name
* @param string OPTIONAL     Optional images path
*/
	function dynCalendar(objName, callbackFunc, targetID)
	{

    this.targetID=targetID;

    // Todays date
		this.today          = new Date();
		this.date           = this.today.getDate();
		this.month          = this.today.getMonth();
		this.year           = this.today.getFullYear();

		this.objName        = objName;
		this.callbackFunc   = callbackFunc;
		this.imagesPath     = arguments[3] ? arguments[3] : 'images/';
		this.defDate        = arguments[4] ? arguments[4] : function() { return [this.year,this.month,this.date]; };
		this.layerID        = arguments[5] ? arguments[5] : 'dynCalendar_layer_' + dynCalendar_layers.length;

		this.offsetX        = 5;
		this.offsetY        = 5;

		this.useMonthCombo  = true;
		this.useYearCombo   = true;
		this.yearComboRange = 5;

		this.currentMonth   = this.month;
		this.currentYear    = this.year;

		/**
        * Public Methods
        */
		this.show              = dynCalendar_show;
		this.writeHTML         = dynCalendar_writeHTML;

		// Accessor methods
		this.setOffset         = dynCalendar_setOffset;
		this.setOffsetX        = dynCalendar_setOffsetX;
		this.setOffsetY        = dynCalendar_setOffsetY;
		this.setImagesPath     = dynCalendar_setImagesPath;
		this.setMonthCombo     = dynCalendar_setMonthCombo;
		this.setYearCombo      = dynCalendar_setYearCombo;
		this.setCurrentMonth   = dynCalendar_setCurrentMonth;
		this.setCurrentYear    = dynCalendar_setCurrentYear;
		this.setYearComboRange = dynCalendar_setYearComboRange;

		/**
        * Private methods
        */
		// Layer manipulation
		this._getLayer         = dynCalendar_getLayer;
		this._hideLayer        = dynCalendar_hideLayer;
		this._showLayer        = dynCalendar_showLayer;
		this._setLayerPosition = dynCalendar_setLayerPosition;
		this._setHTML          = dynCalendar_setHTML;

		// Miscellaneous
		this._getDaysInMonth   = dynCalendar_getDaysInMonth;
		this._mouseover        = dynCalendar_mouseover;

		/**
        * Constructor type code
        */
		dynCalendar_layers[dynCalendar_layers.length] = this;
		this.writeHTML();
	}

	function dynCalendar_show()
	{
		// Variable declarations to prevent globalisation
		var month, year, monthnames, numdays, thisMonth, firstOfMonth;
		var ret, row, i, cssClass, linkHTML, previousMonth, previousYear;
		var nextMonth, nextYear, prevImgHTML, prevLinkHTML, nextImgHTML, nextLinkHTML;
		var monthComboOptions, monthCombo, yearComboOptions, yearCombo, html;

		this.currentMonth = month = arguments[0] != null ? arguments[0] : this.currentMonth;
		this.currentYear  = year  = arguments[1] != null ? arguments[1] : this.currentYear;

//		monthnames = new Array('Január', 'Február', 'Március', 'Április', 'Május', 'Június', 'Július', 'Augusztus', 'Szeptember', 'Október', 'November', 'December');
		monthnames = new Array('January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December');
		// Main body of calendar

//    var wds= '<tr><td class="dynCalendar_dayname">H</td><td class="dynCalendar_dayname">K</td><td class="dynCalendar_dayname">Sz</td><td class="dynCalendar_dayname">Cs</td><td class="dynCalendar_dayname">P</td><td class="dynCalendar_dayname">Sz</td><td class="dynCalendar_dayname">V</td></tr>';
    var wds= '<tr><td class="dynCalendar_dayname">Mo</td><td class="dynCalendar_dayname">Tu</td><td class="dynCalendar_dayname">We</td><td class="dynCalendar_dayname">Th</td><td class="dynCalendar_dayname">Fr</td><td class="dynCalendar_dayname">Sa</td><td class="dynCalendar_dayname">Su</td></tr>';

var r2=new Array();
//var thisMonth=new Array();var ret=new Array();

var y2=year; var m2=month-1; if (m2==-1) { y2--; m2=11; } var ms=3;
while (ms>0) {

		numdays    = this._getDaysInMonth(m2, y2);

		thisMonth = new Date(y2, m2, 1);
		firstOfMonth = thisMonth.getDay();
		// First few blanks up to first day
		ret= new Array(new Array());
        var fd=firstOfMonth-1; if (fd<0) fd+=7;
		for(var i=0; i<fd; i++){
			ret[0][ret[0].length] = '<td class="dynCalendar_emptyday">&nbsp;</td>';
		}
var DD=this.defDate();

		row = 0;
		i   = 1;

		while(i <= numdays){
			if(ret[row].length == 7){
				ret[++row] = new Array();
			}

      var ad=(fd+i)%7; if (ad==0) ad=7;

			cssClass = (i==DD[2] && m2==DD[1]-1 && y2==DD[0])  ? 'dynCalendar_today' : (ad>5? 'dynCalendar_weekend':'dynCalendar_weekday'); var linkJS=sprintf('%s(%s, %s, %s); %s._hideLayer();', this.callbackFunc, i, Number(m2) + 1, y2, this.objName); 
            linkHTML = i++;
            var mOver="this.oCN=this.className; this.className='dynCalendar_day_over';";
			var mOut="this.className=this.oCN;";


			ret[row][ret[row].length] = sprintf('<td align="center" onmouseover="%s" onmouseout="%s" onclick="%s" class="%s">%s</td>', mOver, mOut, linkJS, cssClass, linkHTML);
		}

		for(var i=0; i<ret.length; i++){ ret[i] = ret[i].join('\n') + '\n';	}
    r2.push('<tr><td colspan="7" class="btitle">'+y2+' '+monthnames[m2]+'</td></tr>'+wds+'<tr>' + ret.join('</tr>\n<tr>') + '</tr>');

 if (m2==11) { y2++; m2=0; } else m2++;

 ms--;
}

		thisMonth = new Date(year, month, 1);

		previousYear  = thisMonth.getFullYear();
		previousMonth = thisMonth.getMonth() - 1;
		if(previousMonth < 0){
			previousMonth = 11;
			previousYear--;
		}

		nextYear  = thisMonth.getFullYear();
		nextMonth = thisMonth.getMonth() + 1;
		if(nextMonth > 11){
			nextMonth = 0;
			nextYear++;
		}

            var mOver="this.oCN=this.className; this.className='dynCalendar_prevnext_over';";
			var mOut="this.className=this.oCN;";

		prevImgHTML  = sprintf('<img src="%s/prev.gif" alt="<<" border="0" style="margin-left:7px; margin-right:3px; width:10px; height:10px;" />', this.imagesPath);
		prevCellHTML = sprintf('<td class="dynCalendar_prevnext" onmouseover="%s" onmouseout="%s" onclick="javascript: %s.show(%s, %s)">%s</td>', mOver,mOut, this.objName, previousMonth, previousYear, prevImgHTML);
		nextImgHTML  = sprintf('<img src="%s/next.gif" alt="<<" border="0" style="margin-left:3px; margin-right:7px; width:10px; height:10px;" />', this.imagesPath);
		nextCellHTML = sprintf('<td class="dynCalendar_prevnext" onmouseover="%s" onmouseout="%s" onclick="javascript: %s.show(%s, %s)">%s</td>', mOver,mOut, this.objName, nextMonth, nextYear, nextImgHTML);

		/**
        * Build month combo
        */
		if (this.useMonthCombo) {
			monthComboOptions = '';
			for (i=0; i<12; i++) {
				selected = (i == thisMonth.getMonth() ? 'selected="selected"' : '');
				monthComboOptions += sprintf('<option value="%s" %s>%s</option>', i, selected, monthnames[i]);
			}
			monthCombo = sprintf('<select name="months" id="months" onchange="%s.show(this.options[this.selectedIndex].value, %s.currentYear)">%s</select>', this.objName, this.objName, monthComboOptions);
		} else {
			monthCombo = monthnames[thisMonth.getMonth()];
		}

		/**
        * Build year combo
        */
		if (this.useYearCombo) {
			yearComboOptions = '';
			for (i = thisMonth.getFullYear() - this.yearComboRange; i <= (thisMonth.getFullYear() + this.yearComboRange); i++) {
				selected = (i == thisMonth.getFullYear() ? 'selected="selected"' : '');
				yearComboOptions += sprintf('<option value="%s" %s>%s</option>', i, selected, i);
			}
			yearCombo = sprintf('<select name="years" id="years" onchange="%s.show(%s.currentMonth, this.options[this.selectedIndex].value)">%s</select>', this.objName, this.objName, yearComboOptions);
		} else {
			yearCombo = thisMonth.getFullYear();
		}

		html = '<table border="0" bgcolor="#eeeeee">';
		html += sprintf('<tr><td colspan="7" style="background-color:#fff;"><table class="hdr_table"><tr>%s<td align="center" class="dynCalendar_header">%s %s</td>%s</tr></table></td></tr>', prevCellHTML, yearCombo, monthCombo, nextCellHTML);
		html += r2.join('</tr><td colspan="7" style="height:5px;"></td></tr>');
		html += '</table>';

		this._setHTML(html);
		if (!arguments[0] && !arguments[1]) {
			this._showLayer();
			this._setLayerPosition();
		}
	}


	function dynCalendar_writeHTML() {
			GE(this.targetID).innerHTML=
        sprintf('<a href="javascript: %s.show()"><img src="%sdynCalendar.gif" border="0" width="16" height="16" /></a>', this.objName, this.imagesPath)+
        sprintf('<div class="dynCalendar" id="%s" onmouseover="%s._mouseover(true)" onmouseout="%s._mouseover(false)"></div>', this.layerID, this.objName, this.objName);
	}

	function dynCalendar_setOffset(Xoffset, Yoffset)
	{
		this.setOffsetX(Xoffset);
		this.setOffsetY(Yoffset);
	}

	function dynCalendar_setOffsetX(Xoffset)
	{
		this.offsetX = Xoffset;
	}

	function dynCalendar_setOffsetY(Yoffset)
	{
		this.offsetY = Yoffset;
	}

	function dynCalendar_setImagesPath(path)
	{
		this.imagesPath = path;
	}

	function dynCalendar_setMonthCombo(useMonthCombo)
	{
		this.useMonthCombo = useMonthCombo;
	}

	function dynCalendar_setYearCombo(useYearCombo)
	{
		this.useYearCombo = useYearCombo;
	}

	function dynCalendar_setCurrentMonth(month)
	{
		this.currentMonth = month;
	}

	function dynCalendar_setCurrentYear(year)
	{
		this.currentYear = year;
	}

	function dynCalendar_setYearComboRange(range)
	{
		this.yearComboRange = range;
	}

	function dynCalendar_getLayer()
	{
		var layerID = this.layerID;

		if (document.getElementById(layerID)) {
			return document.getElementById(layerID);
		} else if (document.all) if (document.all(layerID)) {
			return document.all(layerID);
		}
	}

	function dynCalendar_hideLayer()
	{
		this._getLayer().style.visibility = 'hidden';
	}

	function dynCalendar_showLayer()
	{
//alert(this.layerID);
		this._getLayer().style.visibility = 'visible';
	}


function docW() { if (document.all) return document.body.clientWidth; else return document.width-10; }
function docH() { if (document.all) return document.body.clientHeight; else return document.height-10; }


	function dynCalendar_setLayerPosition()
	{
        var L=this._getLayer(); var top,left;
        top=dynCalendar_mouseY + this.offsetY;
        if (top+L.offsetHeight>docH() && top-L.offsetHeight>0) top-=L.offsetHeight;
		left=dynCalendar_mouseX + this.offsetX;
        if (left+L.offsetWidth>docW() && left-L.offsetWidth>0) left-=L.offsetWidth;
        L.style.top=top+'px'; L.style.left=left+'px';


	}

  function dynCalendar_setHTML(html)
	{
		this._getLayer().innerHTML = html;
	}

	function dynCalendar_getDaysInMonth(month, year)
	{
		monthdays = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
		if (month != 1) {
			return monthdays[month];
		} else {
			return ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0 ? 29 : 28);
		}
	}

	function dynCalendar_mouseover(status)
	{
		dynCalendar_mouseoverStatus = status;
		return true;
	}

	if (!mouseMoveEventAssigned) {
		dynCalendar_oldOnmousemove = document.onmousemove ? document.onmousemove : new Function;
        var dw;
		document.onmousemove = function ()
		{
			if (arguments[0]) {
				dynCalendar_mouseX = arguments[0].pageX;
				dynCalendar_mouseY = arguments[0].pageY;
			} else {
				dynCalendar_mouseX = event.clientX + document.documentElement.scrollLeft;
				dynCalendar_mouseY = event.clientY + document.documentElement.scrollTop;
				arguments[0] = null;
			}
			dynCalendar_oldOnmousemove(arguments[0]);
		}

		var mouseMoveEventAssigned = true;
	}

	if (!clickEventAssigned) {
		dynCalendar_oldOnclick = document.onclick ? document.onclick : new Function;

		document.onclick = function ()
		{
			if(!dynCalendar_mouseoverStatus){
				for(i=0; i<dynCalendar_layers.length; ++i){
					dynCalendar_layers[i]._hideLayer();
				}
			}

			dynCalendar_oldOnclick(arguments[0] ? arguments[0] : null);
		}
		var clickEventAssigned = true;
	}

	function sprintf(strInput)
	{
		var strOutput  = '';
		var currentArg = 1;

		for (var i=0; i<strInput.length; i++) {
			if (strInput.charAt(i) == '%' && i != (strInput.length - 1) && typeof(arguments[currentArg]) != 'undefined') {
				switch (strInput.charAt(++i)) {
					case 's':
						strOutput += arguments[currentArg];
						break;
					case '%':
						strOutput += '%';
						break;
				}
				currentArg++;
			} else {
				strOutput += strInput.charAt(i);
			}
		}

		return strOutput;
	}