function is_ns_4()
 {
  if(navigator.appVersion.substring(0,1) == "4" && navigator.appName =='Netscape')
   return true;
  else
   return false;
 }



// function to display msg´s in the status-window from the Browser
function MM_displayStatusMsg(msgStr) { //v1.0
  status=msgStr;
  document.MM_returnValue = true;
}

function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}

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_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 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 movelayer() {
    if (document.layers) {
        document.layers['help'].pageY = window.pageYOffset;
    }
    else if (document.all) {
        document.all['help'].style.posTop = document.body.scrollTop;
    }
    setTimeout('movelayer()',100);
}

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;
}

// returns the browser-typ (NS=Netscape,IE=Internet explorer, opera=Opera, unknown = any other)
function what_browser()
 {
  if(navigator.appName=="Netscape")
   return ('NS');
  else if(navigator.appName=="Microsoft Internet Explorer")
   return ('IE');
  else if(navigator.appName=="Opera")
   return('opera');
  else
   return('unknown'); 
 }


// returns the browser-version in format x.x
function what_browser_version()
 {
  return navigator.appVersion.substring(0,3);
 }


function make_empty(name)
 { return name.value = ""; } 

var submitcount=0;

function check_mail_form()
 {
  var errormsg="";
  var str="";
  if(document.forms.mailform.vorname.value=="")
   { errormsg +="Das Feld Vorname muss ausgefüllt werden.\n"; }
  if(document.forms.mailform.nachname.value=="")
   { errormsg +="Das Feld Nachname muss ausgefüllt werden.\n"; }
  if(document.forms.mailform.nachricht.value=="")
   { errormsg +="Das Feld Nachricht muss ausgefüllt werden.\n"; }
  if(document.forms.mailform.email.value=="")
   { errormsg +="Das Feld Email muss ausgefüllt werden.\n"; }
  if(errormsg=='')
   {
    if (submitcount == 0)
     {
      submitcount = 1;
      document.forms.mailform.submit();
      return true;
     } else {
      alert("Ihre Anfrage wird gerade beantwortet, dies kann je nach Verbindungsgeschwindigkeit einige Sekunden dauern.");
      return false;
     }
   }
  else
   {
    alert('Folgende Fehler sind beim ausfüllen des Formulars aufgetreten:\n\n'+errormsg);
    return false;
   }
 }

function validate(email)
 {
  if(email.length < 6){return false;}
	if(email.indexOf(" ") != -1){return false;}
	if(email.indexOf("ä") != -1){return false;}
	if(email.indexOf("ö") != -1){return false;}
	if(email.indexOf("&uuml;") != -1){return false;}
	if(email.indexOf("ß") != -1){return false;}
	if(email.indexOf("@") < 1){return false;}
	if(email.indexOf(".") < 1){return false;}
	if((email.length - 2) <= (email.lastIndexOf("."))){return false;}
	if((email.length - 2) <= (email.lastIndexOf("@"))){return false;}
	if(!(email.substr((email.lastIndexOf("@")+1)).lastIndexOf("."))){return false;}
	return true;
 }

function check_newsletter_form()
 {
  if(validate(document.forms.newsletterform.email.value))
   {
    document.forms.newsletterform.submit();
    return true;
   } else {
    alert("Bitte füllen sie das Feld 'E-Mail' korrekt aus!");
   }
}

function change_lang(id,currentlang,site)
 {
  var one = parent.menu.location.search;
  var two = one.split("&");
  var three = '';
  for(var i=0;i<two.length;++i)
   {
    if(!two[i].match(/^lang_id=/) && !two[i].match(/^\?lang_id=/))
     three += two[i]+'&';
   }

  if(three !='')
   three += 'lang_id='+id;
  else
   three += '?lang_id='+id;
  //alert(three);
  parent.menu.location.href='menu.php?'+three;
 }

function do_search(f)
 {
  var one = parent.menu.location.search;
  var two = one.split("&");
   for(i=0;i<two.length;++i)
    {
     if(two[i].match(/^lang_id=/))
      {
       f.action='main.php?'+two[i]+"&do=search";
       f.submit();
      } else if(two[i].match(/^\?lang_id=/)) {
       f.action='main.php'+two[i]+"&do=search";
       f.submit();
      }
    }
 }

function goto_main()
 {
  var one = parent.menu.location.search;
  var two = one.split("&");
   for(i=0;i<two.length;++i)
    {
     if(two[i].match(/^lang_id=/))
      {
       parent.main.location.href='main.php?'+two[i];
      } else if(two[i].match(/^\?lang_id=/)) {
       parent.main.location.href='main.php'+two[i];
      }
    }
 }

function goto_content_from_right(menu_id)
 {
  var one = parent.menu.location.search;
  var two = one.split("&");
   for(i=0;i<two.length;++i)
    {
     if(two[i].match(/^lang_id=/))
      {
       parent.menu.location.href='menu.php?menu='+menu_id+'&'+two[i];
      } else if(two[i].match(/^\?lang_id=/)) {
       var three = two[i].substring(1,999);
       parent.menu.location.href='menu.php?menu='+menu_id+'&'+three;
      }
    }
 }