/**********************************************************************
*          Calendar JavaScript [DOM] v3.01 by Michael Loesler          *
************************************************************************
* Copyright (C) 2005-07 by Michael Loesler, http//derletztekick.com    *
*                                                                      *
*                                                                      *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 3 of the License, or    *
* (at your option) any later version.                                  *
*                                                                      *
* This program is distributed in the hope that it will be useful,      *
* but WITHOUT ANY WARRANTY; without even the implied warranty of       *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the        *
* GNU General Public License for more details.                         *
*                                                                      *
* You should have received a copy of the GNU General Public License    *
* along with this program; if not, see <http://www.gnu.org/licenses/>  *
* or write to the                                                      *
* Free Software Foundation, Inc.,                                      *
* 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.            *
*                                                                      *
 **********************************************************************/

/**********************************************************************
* This version of the Script was modified to run with the singapore(C) *
* webtemplate by Uli Sobers, www.free-templates-sobers.de, Nov. 2007.  *
* Showing saturdays in red was removed, date display set to english.   *
 **********************************************************************/

  function CalendarJS() {
                this.now = new Date();
                this.dayname = ["Mo","Di","Mi","Do","Fr","Sa","So"];
                this.monthname = ["Januar","Februar","M&auml;rz","April","Mai","Juni","Juli","August","September","Oktober","November","Dezember"];
                this.dayspermonth = [31,28,31,30,31,30,31,31,30,31,30,31];
                this.tooltip = ["previous","next"];
                this.monthCell = document.createElement("th");
                this.tableHead = null;
                this.parEl = null;

                this.init = function( id ) {
                        this.date = this.now.getDate();
                        this.month = this.mm = this.now.getMonth();
                        this.year = this.yy = this.now.getFullYear();
                        this.monthCell.colSpan = 5;
                        this.monthCell.appendChild(document.createTextNode( this.monthname[this.mm]+" "+this.yy ));
                        this.tableHead = this.createTableHead();
                        this.parEl = document.getElementById( id );
                        this.show();
                }

                this.removeElements = function( Obj ) {
                        for (var i=0; i<Obj.childNodes.length; i++)
                                Obj.removeChild(Obj.childNodes[i]);
                        return Obj;
                }

                this.show = function() {
                        this.parEl = this.removeElements( this.parEl );
                        this.monthCell.firstChild.replaceData(0, this.monthCell.firstChild.nodeValue.length, this.monthname[this.mm]+" "+this.yy);
                        var table = document.createElement("table");
                        table.appendChild( this.createTableBody() );
                        table.appendChild( this.tableHead );
                        this.parEl.appendChild( table );
                }

                this.createTableHead = function() {
                        var thead = document.createElement("thead");
                        var tr = document.createElement("tr");
                        var th = document.createElement("th");
                        th.appendChild(document.createTextNode( "\u00AB" ));
                        th.Instanz = this;
                        th.onclick = function() { this.Instanz.switchMonth("prev"); };
                        th.title = this.tooltip[0];
                        try { th.style.cursor = "pointer"; } catch(e){ th.style.cursor = "hand"; }
                        tr.appendChild( th );
                        tr.appendChild( this.monthCell );
                        th = document.createElement("th");
                        th.appendChild(document.createTextNode( "\u00BB" ));
                        th.Instanz = this;
                        th.onclick = function() { this.Instanz.switchMonth("next"); };
                        th.title = this.tooltip[1];
                        try { th.style.cursor = "pointer"; } catch(e){ th.style.cursor = "hand"; }
                        tr.appendChild( th );
                        thead.appendChild( tr );
                        tr = document.createElement('tr');
                        for (var i=0; i<this.dayname.length; i++)
       if (i <= 5){
        tr.appendChild( this.getCell("th", this.dayname[i], "weekday" ) );}
       if (i = 6){
        tr.appendChild( this.getCell("th", this.dayname[i], "weekend" ) );}
      thead.appendChild( tr );
                        return thead;
                }

                this.createTableBody = function() {
                        var sevendaysaweek = 0;
                        var begin = new Date(this.yy, this.mm, 1);
                        var firstday = begin.getDay()-1;
                        if (firstday < 0)
                                firstday = 6;
                        if ((this.yy%4==0) && ((this.yy%100!=0) || (this.yy%400==0)))
                                this.dayspermonth[1] = 29;

                        var tbody = document.createElement("tbody");
                        var tr = document.createElement('tr');

                        for (var i=0; i<firstday; i++, sevendaysaweek++)
                                tr.appendChild( this.getCell( "td", " ", null ) );

                        for (var i=1; i<=this.dayspermonth[this.mm]; i++, sevendaysaweek++){
                                if (this.dayname.length == sevendaysaweek){
                                        tbody.appendChild( tr );
                                        tr = document.createElement('tr');
                                        sevendaysaweek = 0;
                                }
                                if (i==this.date && this.mm==this.month && this.yy==this.year && (sevendaysaweek == 6))
                                        tr.appendChild( this.getCell( "td", i, "today weekend" ) );
                                else if (i==this.date && this.mm==this.month && this.yy==this.year)
                                        tr.appendChild( this.getCell( "td", i, "today" ) );
                                else if (sevendaysaweek == 6)
                                        tr.appendChild( this.getCell( "td", i, "weekend" ) );
                                else
                                        tr.appendChild( this.getCell( "td", i, null ) );
                        }

                        for (var i=sevendaysaweek; i<this.dayname.length; i++)
                                tr.appendChild( this.getCell( "td", " ", null  ) );

                        tbody.appendChild( tr );
                        return tbody;

                }

                this.getCell = function(tag, str, cssClass) {
                        var El = document.createElement( tag );
                        El.appendChild(document.createTextNode( str ));
                        if (cssClass != null)
                                El.className = cssClass;
                        return El;
                }

                this.switchMonth = function( s ){
                        switch (s) {
                                case "prev":
                                        this.yy = (this.mm == 0)?this.yy-1:this.yy;
                                        this.mm = (this.mm == 0)?11:this.mm-1;
                                break;

                                case "next":
                                        this.yy = (this.mm == 11)?this.yy+1:this.yy;
                                        this.mm = (this.mm == 11)?0:this.mm+1;
                                break;
                        }
                        this.show();
                }
        }

        var DOMContentLoaded = false;
        function addContentLoadListener (func) {
                if (document.addEventListener) {
                        var DOMContentLoadFunction = function () {
                                window.DOMContentLoaded = true;
                                func();
                        };
                        document.addEventListener("DOMContentLoaded", DOMContentLoadFunction, false);
                }
                var oldfunc = (window.onload || new Function());
                window.onload = function () {
                        if (!window.DOMContentLoaded) {
                                oldfunc();
                                func();
                        }
                };
        }

        addContentLoadListener( function() {
                        new CalendarJS().init("calendar");
        } );