function sujetbildstartseite(unterseite, bildlink) {
	var datum = new Date();
	var monat = datum.getMonth();  
	monat++; 	
		if(unterseite=='nein'){
				if(monat>"3" && monat<"11" ){
							 document.write("<img src='"+bildlink+"sommerbild.jpg' title='Startseitenbild Sommer' alt='Startseitenbild Sommer'  id='sujet_startseite' />");}
				 else {document.write("<img src='"+bildlink+"winterbild.jpg' title='Startseitenbild Winter' alt='Startseitenbild Winter'  id='sujet_startseite' />");}
				  	   }
			else {
				 	 if(monat>"3" && monat<"11" ){
				 document.write("<img src='"+bildlink+"sujet_sommer.jpg' title='Sujet Sommer' alt='Sujet Sommer'  id='sujet' />");}
				 else {document.write("<img src='"+bildlink+"sujet_winter.jpg' title='Sujet Winter' alt='Sujet Winter'  id='sujet' />");}
				  	   } 
	}
 
function navlihover() {	 
  if (document.getElementById('subnav')){
    var navlis = document.getElementById('subnav').getElementsByTagName("LI");
    for (var i=0; i<navlis.length; i++) {
            navlis[i].onmouseover=function() {
                    this.className+=" lihover"; }
            navlis[i].onmouseout=function() {
                    this.className=this.className.replace(new RegExp("lihover\\b"), "");}
    }
}
		if (document.getElementById('nav')){
    var navlis = document.getElementById('nav').getElementsByTagName("LI");
    for (var i=0; i<navlis.length; i++) {
            navlis[i].onmouseover=function() {
                    this.className+=" lihover"; }
            navlis[i].onmouseout=function() {
                    this.className=this.className.replace(new RegExp("lihover\\b"), "");}
    }
}

}
window.onload = navlihover;

function aktivieren(element) {
	oldClass = element.className;
	element.className = oldClass+' activate';
	if (!element.onmouseout) {
		element.onmouseout = function (event) { element.className=oldClass; };
	}
}
	

// Findet die absolute y Position eines Elementes raus
function getAbsoluteY(elm){
   var y = 0;
   if (elm && typeof elm.offsetParent != "undefined") {
     while (elm && typeof elm.offsetTop == "number") {
       y += elm.offsetTop;
       elm = elm.offsetParent;
     }
   }
   return y;
}	

// Findet die absolute x Position eines Elementes raus
function getAbsoluteX(xln){
   var x = 0;
   if (xln && typeof xln.offsetParent != "undefined") {
     while (xln && typeof xln.offsetLeft == "number") {
       x += xln.offsetLeft;
       xln = xln.offsetParent;
     }
   }
   return x;
}	
	
					

function aktivierenma(element,name) {  	

	oldClass = element.className;
	element.className = oldClass+' activate';
	bildid = "m"+name;	
	bild = document.getElementById(bildid); 
	var elm = document.getElementById("id"+name);	  
	
	var y = getAbsoluteY(elm);	   				   // herausfinden des y werts 
	var xln = getAbsoluteX(elm);				   // herausfinden des x werts
	ynew = Number(y)-210;
	xnew = Number(xln); 
	
	inhalt = document.getElementById('content');
	contentweite = inhalt.offsetWidth - xnew-200;  
	
	if(contentweite<220)  
			{xnew = xnew -240;} 
			else{xnew = xnew+200;}
		 	bild.style.display = "block";	   
			
	bild.style.top = ynew+"px";
	bild.style.left = xnew+"px";	   
	
		if (!element.onmouseout) {
		element.onmouseout = function (event) { element.className=oldClass; 
												bild = document.getElementById(bildid);
												bild.style.display = "none";  												
												};
	}
}
 

function getAdr(prefix, postfix, text) {
        document.write('<a href="mailto:' + prefix + '@' + postfix + '">' + (text ? text.replace(/&quot;/g, '"').replace(/%EMAIL%/, prefix + '@' + postfix) : prefix + '@' + postfix) + '</a>');
}

function swapImage(element, newimage) {	

	var oldsrc = element.src
	element.src = newimage	   
	if (!element.onmouseout)
		element.onmouseout = function (event) { swapImage(this, oldsrc); };
}


var popupmenuoldonload = window.onload;
window.onload = function() {
	var nav = document.getElementById('nav');
	var uls = nav.getElementsByTagName('UL');
	for(var i = 0; i < uls.length; i++)
		new xMenu1(uls[i], 0, 'mouseover');
	if(popupmenuoldonload)
		popupmenuoldonload();
}

function xMenu1(menu, mouseMargin, openEvent) {
	var isOpen = false;
        var oldover, oldout, aObj, aClassName, img;
	if (menu) {
		xAddEventListener(menu.parentNode, openEvent, onOpen, false);
		aObj = menu.parentNode.firstChild;
                aClassName = aObj.className;
                img = aObj.firstChild;
		if(img)
			if (img.onmouseover) {
				oldover = img.onmouseover;
				img.onmouseover = '';
			}
	}
	function onOpen() {
		if (!isOpen) {
			aObj.className = 'hover';
                        xShow(menu);
			HideSelects(xPageX(menu), xPageY(menu), xWidth(menu), xHeight(menu));
			xAddEventListener(document, 'mousemove', onMousemove, false);
			isOpen = true;
			if (oldover) {
				oldover.apply(img, arguments);
				if (!oldout)
					oldout = img.onmouseout;
				img.onmouseout = function () { };
			}
		}
	}
	function onMousemove(ev) {
		var e = new xEvent(ev);
		contains = (xHasPoint(menu, e.pageX, e.pageY, -mouseMargin) || xHasPoint(menu.parentNode, e.pageX, e.pageY, -mouseMargin));
		if(!contains) {
			var submenus = menu.getElementsByTagName('UL');
			for(var i = 0; i < submenus.length; i++)
				if(xHasPoint(submenus[i], e.pageX, e.pageY, -mouseMargin)) {
					contains = true;
					break;
				}
		}
		if(!contains) {
                        aObj.className = aClassName;
			xHide(menu);
			HideSelects(0, 0, 0, 0);
			xRemoveEventListener(document, 'mousemove', onMousemove, false);
			isOpen = false;
			if (oldout)
				oldout.apply(img, arguments);
		}
	}
}

var sel;
function HideSelects(x,y,w,h) {
	if(xIE4Up && !xMac) {
		var selx, sely, selw, selh, i
		if(!sel)
			sel = document.getElementsByTagName("SELECT");
		for(i = 0; i < sel.length; i++) {
			selx = xPageX(sel[i]);
			sely = xPageY(sel[i]);
			selw = sel[i].offsetWidth;
			selh = sel[i].offsetHeight;
			sel[i].style.visibility = (selx + selw > x && selx < x + w && sely + selh > y && sely < y + h) ? "hidden" : "visible";
		}
	}
}


// deletes leading and trailing spaces in a string - adds the function directly to the String Object, so that all strings inherit this method
String.prototype.trim = function() {
    return this.replace(/(^\s*)|(\s*$)/g, '');
}

//checkEmail - needed for forms
function checkEmail(val) {
	if (val) {
		var usr = "([a-zA-Z0-9][a-zA-Z0-9_.-]*|\"([^\\\\\x80-\xff\015\012\"]|\\\\[^\x80-\xff])+\")";
		var domain = "([a-zA-Z0-9][a-zA-Z0-9._-]*\\.)*[a-zA-Z0-9][a-zA-Z0-9._-]*\\.[a-zA-Z]{2,5}";
		var regex = "^"+usr+"\@"+domain+"$";
		var myrxp = new RegExp(regex);
		var check = (myrxp.test(val));
		if (check!=true) {
			return false;
		}
		else {
			return true;
		}
	}
}

/*
validates formfields if they have a value or not
to check for other options do the following
specialfields = new Object();
specialfields.fieldname = new Object();
specialfields.fieldname.check1 = 'function_to_call,error_message';
specialfields.fieldname.check2 = 'second_function_to_call,second_error_message';
specialfields.another_fieldname = new Object();
specialfields.another_fieldname.check1 = 'function_to_call,error_message';
*/
function validateForm(form,specialfields) {
	var errors = new Array();
	var fields = form.getElementsByTagName('label');
	for (i = 0; i < fields.length; i++) {
		var span = fields[i].getElementsByTagName('span')[0];
		if (span && span.firstChild) {
			var label = span.firstChild.data;
			label = label.trim();
			// if there is a '*' in the label - this indicates the inputfield has to be filled
			if (label.charAt(label.length - 1) == '*') {
				label = label.substring(0, label.length - 1).trim();
				// get the inputfield
				var obj_input = fields[i].getElementsByTagName('input');
				if (!obj_input[0])
					obj_input = fields[i].getElementsByTagName('select');
				if (!obj_input[0])
					obj_input = fields[i].getElementsByTagName('textarea');

				// if there is an inputfield
				if (obj_input && obj_input[0]) {
					input = obj_input[0];
					error = false;
					
					// check if the inputfield has a value
					if (!input.value || input.value.trim().length==0) {
						error = true;
						errors.push(label + ' nicht eingegeben');
					}
					
					// check the inputfield for special things (email, ...)
					if (!error && specialfields[input.name]){
						specialfield = specialfields[input.name];
						for (check in specialfield){
							check_function = specialfield[check].split(',')[0];
							check_message = specialfield[check].split(',')[1];
							if (!eval(check_function)(input.value)){
								error = true;
								errors.push(label + ' ' + check_message);
							}
						}
					}

					// on error give the label the className 'error' otherwise delete the className 'error' (if exists)
					if (error) {
						className = fields[i].className;
						if (className.length>0){
							className = className + ' ';
						}
						fields[i].className = className + 'error';
					} else {
			            	className = fields[i].className;
						if (className.indexOf('error')>-1){
								className = className.replace(' error', '');
								className = className.replace('error', '');
								fields[i].className = className;
						}
					}
				}
			}
		}
	}

	return errors;
}

function showFormErrors (errors) {
	error_message = '';
	for (i=0;i<errors.length;i++){
		error_message += errors[i] + '\n';
	}
	alert(error_message);
}


function popup(url, typ, para1, width, height) {
	attrib = "";
	Y = (screen.height - width) / 2;
	X = (screen.width - height) / 2;
	X = Math.round(X);
	Y = Math.round(Y);
	if (para1 == 'CENTER') attrib += 'height=' + height + ',width=' + width + ',top=' + Y + ',left=' + X;
	if (typ == 'TYP1') attrib += ",scrollbars=yes, resizable=yes";
	if (typ == 'TYP2') attrib += ",scrollbars=yes";
	if (typ == 'TYP3') attrib += ",scrollbars=yes,menubar=yes";
	fenster = window.open(url, 'win', attrib);
	return false;
}


startpiconload = window.onload;
startpiconresize = window.onresize;

window.onload = window.onresize = function() {
	changeStartPicSize();
	if(startpiconload)
		startpiconload();
	if(startpiconresize)
		startpiconresize();
}

function changeStartPicSize() {
	startpicdiv = document.getElementById('bild_startseite');
	startpic = document.getElementById('sujet_startseite');
	if (startpic) {
		if ((startpicdiv.offsetWidth / startpicdiv.offsetHeight) > (startpic.width / startpic.height)) {
			startpic.className= '';
		} else {
			startpic.className= 'stechheigth';
		}
	}
}



//Bildergalerie	
	
function ShowGallery(id)
{
	for(i=0;i<gallerypix.length;i++)
	{
		document.getElementById('galpic_'+gallerypix[i]).style.display='none'
	}

	document.getElementById('galpic_'+gallerypix[id]).style.display='block'
}