// Browser überprüfen

function MM_checkBrowser(NSvers,NSpass,NSnoPass,IEvers,IEpass,IEnoPass,OBpass,URL,altURL) {
  var newURL='', verStr=navigator.appVersion, app=navigator.appName, version = parseFloat(verStr);
    if (app.indexOf('Netscape') != -1) {
    if (version >= NSvers) {
	  if (NSpass>0) newURL=(NSpass==1)?URL:altURL;}
    else  {
      if (NSnoPass>0) newURL=(NSnoPass==1)?URL:altURL;}
}   else if (app.indexOf('Microsoft') != -1) {
      if (version >= IEvers || verStr.indexOf(IEvers) != -1)  {
	  if (IEpass>0) newURL=(IEpass==1)?URL:altURL;}
    else {
      if (IEnoPass>0) newURL=(IEnoPass==1)?URL:altURL;}
} 
    else if (OBpass>0) newURL=(OBpass==1)?URL:altURL;
      if (newURL) { window.location=unescape(newURL); document.MM_returnValue=false; }
}


// Flash Plugin überprüfen

function MM_checkPlugin(plgIn, theURL, altURL, autoGo) {
  var ok=false; document.MM_returnValue = false;
  with (navigator) if (appName.indexOf('Microsoft')==-1 || (plugins && plugins.length)) {
    ok=(plugins && plugins[plgIn]);
  } else if (appVersion.indexOf('3.1')==-1) {
    if (plgIn.indexOf("Flash")!=-1 && window.MM_flash!=null) ok=window.MM_flash;
    else if (plgIn.indexOf("Director")!=-1 && window.MM_dir!=null) ok=window.MM_dir;
    else ok=autoGo; }
  if (!ok) theURL=altURL; if (theURL) window.location=theURL;
}


// Netscape Reload wenn Browserfenstergrösse verändert

function MM_reloadPage(init) {
  if (init==true) with (navigator) {if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
    document.MM_pgW=innerWidth; document.MM_pgH=innerHeight; onresize=MM_reloadPage; }}
  else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) location.reload();
}
MM_reloadPage(true);


// Browserfenster öffnen

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


// Bilder vorausladen

function MM_preloadImages() {
  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];}}
}


// Rolloverbild anzeigen

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];}
}


// Rolloverbild entladen

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


// DHTML - Layer anzeigen / verbergen

function MM_findObj(n, d) {
  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 && document.getElementById) x=document.getElementById(n);
return x;
}

function MM_showHideLayers() {
  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;
	}
  }
}


// Formular überprüfen

function formcheck()
  {
  var error_msg="";

  if (document.formular.Name.value == "")
    error_msg += "- Name\n";

  if (document.formular.Vorname.value == "")
    error_msg += "- Vorname\n";

  email = document.formular.email.value
  at_pos = email.indexOf("@");
  dot_pos = email.lastIndexOf(".");

  // Bedingungen für gültige E-Mail-Adresse:
  // @-Zeichen, Punkt hinter dem @, Punkt nicht als letztes Zeichen
  if (at_pos != -1 && dot_pos > at_pos && email.length-1 != dot_pos)
    ;
  else
    error_msg += "- E-Mail\n";

  if (document.formular.Nachricht.value == "")
    error_msg += "- Nachricht\n";

  if (error_msg == "")
    return true;
  else
    {
    alert("Folgende Felder sind nicht oder nur teilweise richtig ausgefüllt worden:\n" + error_msg);
    return false;
    }
}