function checkForm(hiddenId) {
	var error = '';
	var required = document.getElementById(hiddenId).value;
	var aRequired = required.split(",");
	var i=0;
	for(i=0; i<aRequired.length;i++) {
		field = aRequired[i];	
		field = trim(field);
		ObjField = document.getElementsByName(field)[0];
		var strField = trim(ObjField.value);		
		if(strField.length < 1) {
			if(error.length==0) {
				error="Bitte Angeben:\n\n";
			}
			error=error+field+"\n";
		}
	}
	if(error.length > 0) {
		error = error.replace('Name','Name (Vor- und Nachname)');
		error = error.replace('Mail','E-Mail Adresse');
		error = error.replace('Telefon','Telefonnummer');
		error = error.replace('Anschrift','Anschrift (Strasse, Postleitzahl und Ort');		
		error = error.replace('Anfrage','Anschrift (Ihr Anfragetext');															  
		alert(error);	
		return(false);
	} else return (true);	
}

function trim (zeichenkette) {
  return zeichenkette.replace (/^\s+/, '').replace (/\s+$/, '');
}

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_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_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];}
}