//----------------------------
// basisfunktionen
//----------------------------

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_showHideLayers() { //v6.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
    obj.visibility=v; }
}

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];}
}


//----------------------------
// eigene funktionen
//----------------------------

function showLayer(name){
	MM_showHideLayers(name,'','show');
}

function hideLayer(name){
	MM_showHideLayers(name,'','hide');
}



// begrenzung von zeichen in einer textarea auf maximal-laenge
function checkMax(field, max) {
	var fieldLength = field.value.length;
	if (fieldLength>max) {
		field.value = field.value.substr(0,max);
		alert('Es sind max. '+max+' Zeichen erlaubt.');
	}
}


// neue text textaerea maximallaenge
// maxlength for textareas => START
function setMaxLength()
{		
	var x = document.getElementsByTagName('textarea');	
	var counter = document.createElement('div');
	counter.className = 'counter';
	
	for (var i=0;i<x.length;i++)
	{
		if (x[i].getAttribute('maxlength'))
		{
			var counterClone = counter.cloneNode(true);
			counterClone.relatedElement = x[i];
			
			counterClone.innerHTML = '<span>0</span>/'+x[i].getAttribute('maxlength');
			x[i].parentNode.insertBefore(counterClone,x[i].nextSibling);
			x[i].relatedElement = counterClone.getElementsByTagName('span')[0];
			x[i].onkeyup = x[i].onchange = checkMaxLength;
			x[i].onkeyup();						
		}

	}
}

function checkMaxLength()
{
	
	var maxLength = this.getAttribute('maxlength');
	var currentLength = this.value.length;
	
	if (currentLength > maxLength)
	{	
		//this.relatedElement.className = 'toomuch';
		this.value=this.value.slice(0, maxLength);		
	}
	else
		this.relatedElement.className = '';
	this.relatedElement.firstChild.nodeValue = currentLength;
	// not innerHTML
}
// maxlength for textareas => END