// JavaScript Document

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function showEvent(id) {
	var el = document.getElementById(id);
	var curel = el.parentNode.firstChild;
	while (curel != null) {
		if (typeof curel.className != "undefined") {
			curel.className = curel.className.replace(" active", "");
		}
			curel = curel.nextSibling;
	}
	el.className = el.className + " active";
	return false;
}

function changeNav(el, over, type) {
	if (el.className == 'active') return;
	var imgsrc = el.src;
	if (type == "")
		type = '.jpg';
	if ( imgsrc.indexOf('-over') >= 0 && over == 0)
		el.src = imgsrc.replace('-over' + type, type);
	else if ( imgsrc.indexOf('-over') == -1)
		el.src = imgsrc.replace(type, '-over' + type);
}

/* replaces src of images which are children of the parent.parent */
function changeRegionImages(el, needle, type) {
	// already active
	curel = el.parentNode.firstChild;
	while (curel != null) {
		if (typeof curel.firstChild != null) {
			if (typeof curel.firstChild.src != "undefined") {
				cursrc = curel.firstChild.src;
				while (cursrc.indexOf(needle + type) > -1)
					cursrc = cursrc.replace(needle + type, type);				
				curel.firstChild.src = cursrc;
				curel.firstChild.className = curel.firstChild.className.replace('active', '');
				}
		}
		curel = curel.nextSibling;
	}
	el.firstChild.src = el.firstChild.src.replace(type, needle + type);

	el.firstChild.className = 'active';
}

	 /* function switches between calendar nav and	
	 	search navigation in the right col */		
	 function SwitchBoxes(tabElement)
	 	{
		var i,obj,v,args=SwitchBoxes.arguments;
  		for (i=1; i<(args.length-1); i+=2) 
		
			{
				v=args[i+1];	// 2nd parameter = visibility
				obj=args[i];	// 1st parameter = obj.name
			
   				obj=document.getElementById(obj).style; 
				v=(v=='show')?'block':(v=='hide')?'none':v; 
    			obj.display=v; 
			}
		// remove classes from children of tabElement
		var tabs = document.getElementById(tabElement).childNodes;
		for (i=0; i < tabs.length; i++)
			if (tabs[i].className)
				tabs[i].className = ' ';
		}
	
		
		 /* function checks if search term is entered */
		
	 function checkSearch(searchfield)
	 	{
		  	
		   field = document.getElementById(searchfield).value;
		   if (field.length < 3)
		   { 
		      alert('Bitte geben Sie mindestens 1 Suchbegriff ein!');
		   } else {
		  		document.getElementById('search').submit();
		   }
		}