function check2(anreise, abreise, personen, zimmer) {
	 
	 anreise=anreise.toString();
	 abreise=abreise.toString();
	  
	 anreise=anreise.split(".");
	 abreise=abreise.split(".");
     
	 if (!anreise[0] || !anreise[1] || !anreise[2]) {
	 	var erroranreise = true;
	 }
	 
	 else if (!abreise[0] || !abreise[1] || !abreise[2]) {
	 	var errorabreise = true;
	 }
	 else {
		 if (anreise[0].length==1) anreise[0]="0"+anreise[0];
		 if (abreise[0].length==1) abreise[0]="0"+abreise[0];
		 
		 if (anreise[1].length==1) anreise[1]="0"+anreise[1];
		 if (abreise[1].length==1) abreise[1]="0"+abreise[1];
		 
		 if (anreise[2].length==2) anreise[2]="20"+anreise[2];
		 if (abreise[2].length==2) abreise[2]="20"+abreise[2];
		 
		 anreisestring = anreise[2]+anreise[1]+anreise[0];
		 abreisestring = abreise[2]+abreise[1]+abreise[0];
	
		 var heute = new Date();
		 heutetag = heute.getDate();
		 heutetag = heutetag.toString();
		 if (heutetag.length==1) heutetag="0"+heutetag;
		 heutemonat = heute.getMonth() + 1;
		 heutemonat = heutemonat.toString();
		 if (heutemonat.length==1) heutemonat="0"+heutemonat;
		 kontrolldatum = heute.getFullYear().toString()+heutemonat+heutetag;
		
		 if (anreisestring < kontrolldatum) {
			var erroranreise = true;
		 }
		 
		 if (abreisestring < kontrolldatum || abreisestring <= anreisestring) {
			var errorabreise = true;
		 }
		 
		 if (anreisestring.length != 8) {
		 	var erroranreise = true;
		 }
		 
		 if (abreisestring.length != 8) {
		 	var errorabreise = true;
		 }
	 }
	 
	 if (erroranreise == true) {
	 	
		// alert('Bitte überprüfen Sie Ihr Anreisedatum');
		document.getElementById('f_date_c1').className = 'input_res_datum errorform';
//		document.getElementById('pfeilf_date_c1').style.visibility = 'visible';
		document.getElementById('f_date_c1').focus();
	 }
	 
	 else if (errorabreise == true) {
	 	
		// alert('Bitte überprüfen Sie Ihr Abreisedatum');
		document.getElementById('f_date_c2').className = 'input_res_datum errorform';
//		document.getElementById('pfeilf_date_c2').style.visibility = 'visible';
		document.getElementById('f_date_c2').focus();
	 }
	 else {
	 	 
		 document.getElementById('f_date_c1').className = 'input_res_datum';
//		 document.getElementById('pfeilf_date_c1').style.visibility = 'hidden';
		 document.getElementById('f_date_c2').className = 'input_res_datum';
//		 document.getElementById('pfeilf_date_c2').style.visibility = 'hidden';
		 
		 anreisestring = anreise[0]+anreise[1]+anreise[2];
		 abreisestring = abreise[0]+abreise[1]+abreise[2];
		 
		 window.open(zielurl = 'https://secure.webres.net/webres/zimmer4/default.asp?LANG=D&HID=9246&WDBL='+anreisestring+'x'+abreisestring+'x'+zimmer+'x'+personen+'','webres',"screenY=210,screenX=640,width=780px,height=549px,left=100,top=100,toolbar=no,status=yes,scrollbars=no,resizable=no");
	}
}



// ** I18N

// Calendar EN language
// Author: Mihai Bazon, <mihai_bazon@yahoo.com>
// Encoding: any
// Distributed under the same terms as the calendar itself.

// For translators: please use UTF-8 if possible.  We strongly believe that
// Unicode is the answer to a real internationalized world.  Also please
// include your contact information in the header, as can be seen above.

// full day names
Calendar._DN = new Array
("Sonntag",
 "Montag",
 "Dienstag",
 "Mittwoch",
 "Donnerstag",
 "Freitag",
 "Samstag",
 "Sonntag");

// Please note that the following array of short day names (and the same goes
// for short month names, _SMN) isn't absolutely necessary.  We give it here
// for exemplification on how one can customize the short day names, but if
// they are simply the first N letters of the full name you can simply say:
//
//   Calendar._SDN_len = N; // short day name length
//   Calendar._SMN_len = N; // short month name length
//
// If N = 3 then this is not needed either since we assume a value of 3 if not
// present, to be compatible with translation files that were written before
// this feature.

// short day names
Calendar._SDN = new Array
("So",
 "Mo",
 "Di",
 "Mi",
 "Do",
 "Fr",
 "Sa",
 "So");

// First day of the week. "0" means display Sunday first, "1" means display
// Monday first, etc.
Calendar._FD = 1;

// full month names
Calendar._MN = new Array
("Januar",
 "Februar",
 "März",
 "April",
 "Mai",
 "Juni",
 "Juli",
 "August",
 "September",
 "Oktober",
 "November",
 "Dezember");

// short month names
Calendar._SMN = new Array
("Januar",
 "Februar",
 "März",
 "April",
 "Mai",
 "Juni",
 "Juli",
 "August",
 "September",
 "Oktober",
 "November",
 "Dezember");

// tooltips
Calendar._TT = {};
Calendar._TT["INFO"] = "";

Calendar._TT["ABOUT"] =
"DHTML Date/Time Selector\n" +
"(c) dynarch.com 2002-2005 / Author: Mihai Bazon\n" + // don't translate this this ;-)
"For latest version visit: http://www.dynarch.com/projects/calendar/\n" +
"Distributed under GNU LGPL.  See http://gnu.org/licenses/lgpl.html for details." +
"\n\n" +
"Date selection:\n" +
"- Use the \xab, \xbb buttons to select year\n" +
"- Use the " + String.fromCharCode(0x2039) + ", " + String.fromCharCode(0x203a) + " buttons to select month\n" +
"- Für eine Schnellauswahl halten Sie die Maustaste über diesen Buttons fest.";
Calendar._TT["ABOUT_TIME"] = "\n\n" +
"Time selection:\n" +
"- Click on any of the time parts to increase it\n" +
"- or Shift-click to decrease it\n" +
"- or click and drag for faster selection.";

Calendar._TT["PREV_YEAR"] = "Voriges Jahr";
Calendar._TT["PREV_MONTH"] = "Voriger Monat";
Calendar._TT["GO_TODAY"] = "Heute auswählen";
Calendar._TT["NEXT_MONTH"] = "Nächster Monat";
Calendar._TT["NEXT_YEAR"] = "Nächstes Jahr";
Calendar._TT["SEL_DATE"] = "Bitte Datum auswählen";
Calendar._TT["DRAG_TO_MOVE"] = "Zum Bewegen festhalten";
Calendar._TT["PART_TODAY"] = " (Heute)";

// the following is to inform that "%s" is to be the first day of week
// %s will be replaced with the day name.
Calendar._TT["DAY_FIRST"] = "Woche beginnt mit %s ";

// This may be locale-dependent.  It specifies the week-end days, as an array
// of comma-separated numbers.  The numbers are from 0 to 6: 0 means Sunday, 1
// means Monday, etc.
Calendar._TT["WEEKEND"] = "0,6";
Calendar._TT["WEEKEND"] = "";

Calendar._TT["CLOSE"] = "Schließen";
Calendar._TT["TODAY"] = "Heute";
Calendar._TT["TIME_PART"] = "(Shift-)Klick oder Festhalten und Ziehen um den Wert zu ändern";

// date formats
Calendar._TT["DEF_DATE_FORMAT"] = "%Y-%m-%d";
Calendar._TT["TT_DATE_FORMAT"] = "%a, %b %e";
Calendar._TT["TT_DATE_FORMAT"] = "%A, %e. %b";

Calendar._TT["WK"] = "Wo.";
Calendar._TT["WK"] = "Wo";
Calendar._TT["TIME"] = "Time:";