navi1off = new Image();
navi1off.src = "grafx/navi/zeitlos.png";
navi1on = new Image();
navi1on.src = "grafx/navi/zeitlos_hover.png";

navi2off = new Image();
navi2off.src = "grafx/navi/websuppe.png";
navi2on = new Image();
navi2on.src = "grafx/navi/websuppe_hover.png";

navi3off = new Image();
navi3off.src = "grafx/navi/mitglied.png";
navi3on = new Image();
navi3on.src = "grafx/navi/mitglied_hover.png";

navi4off = new Image();
navi4off.src = "grafx/navi/ausgaben.png";
navi4on = new Image();
navi4on.src = "grafx/navi/ausgaben_hover.png";

function img_act(imgName,PicName) {
	document[PicName].src = eval(imgName+".src");
}

function openMedia(nr) {
        breite = 480;
	hoehe = 360;
	
	str = "media/"+ nr +"/popup.php";
	tipWin1 = window.open(str, 'tipWin1', 'width='+ breite +', height='+ hoehe +', resizeable=no, scrollbars=yes');
	tipWin1.opener = self;
	tipWin1.moveTo(((screen.availWidth-breite)/2),((screen.availHeight-hoehe-50)/2));
}

function visibleMusik(id)  {
	if (document.getElementById) {
	    var mydiv = document.getElementById(id);
	    mydiv.style.display = (mydiv.style.display=='block'?'none':'block');
	    
	    var myimg = document.getElementById(id +"img");
	    if (myimg.title == "close") {
	    	myimg.src = "grafx/musik/open.gif";
	    	myimg.title = "open";
	    } else {
	    	myimg.src = "grafx/musik/close.gif";
	    	myimg.title = "close";
	    }
	}
}

function checkForm() {
	if (document.frmanmeldung.vname.value == "") {
		alert("Bitte geben Sie Ihren Vornamen an!");
		document.frmanmeldung.vname.focus();
		return false;
	
	}
	
	if (document.frmanmeldung.nname.value == "") {
		alert("Bitte geben Sie Ihren Nachnamen an!");
		document.frmanmeldung.nname.focus();
		return false;
	}
	
	if (document.frmanmeldung.strasse.value == "") {
		alert("Bitte geben Sie Ihre Strasse an!");
		document.frmanmeldung.strasse.focus();
		return false;
	}
	
	var ausdruck = /^\d{4}$/;
	var plz = document.frmanmeldung.plz.value;
	var result = ausdruck.test(plz);
	
	if (result != true) {
		alert("Bitte geben Sie eine korrekte Postleitzahl an. Max. 4 Zahlen!");
		document.frmanmeldung.plz.focus();
		return false;
	}
	
	if (document.frmanmeldung.ort.value == "") {
		alert("Bitte geben Sie einen Wohnort an!");
		document.frmanmeldung.ort.focus();
		return false;
	}
	
	var address = document.frmanmeldung.email.value;
	if (address == "") {
		alert("Bitte geben Sie Ihre Emailadresse an!");
		document.frmanmeldung.email.focus();
		return false;
	} else {
        	if (!checkEmail(address, true)) {
          		alert ("Ihre EMail Adresse ist syntaktisch falsch!");
          		document.frmanmeldung.email.focus();
          		return false;
          	} else {
          		return true;
          	}
	}
}

function isDigit( ch ) {
    if ( (ch >= '0') && (ch <= '9') )
      return true;
    else
      return false;
}


  function isAlpha( ch )
  {
    if ( ((ch >= 'a') && (ch <= 'z')) || ((ch >= 'A') && (ch <= 'Z')) )
      return true;
    else
      return false;
  }


  function isAlnum( ch )
  {
    if ( isAlpha( ch ) || isDigit( ch ) )
      return true;
    else
      return false;
  }


  function notIn( str1, str2 )
  {
    var i = 0;
    var j = str2.length;
    for( ; i<j; i++ )
    {
      var str3 =  str2.charAt(i);
      if( str1.indexOf( str3 ) != -1 )
        return false;
    }
    return true;
  }


  function checkUsername( username, mustBeQuoted )
  {
    var i = 0;
    var j = username.length;
    if ( username.charAt(0) != '"' )
    {
      if ( (username.charAt(0) <  ' ') || (username.charAt(0) >  '~')
            || !notIn( mustBeQuoted, username.charAt(0) ) )
        return false;
      for( i=1; i<j; i++ )
      {
        if ( ( (username.charAt(i) < ' ') || (username.charAt(i) >  '~')
              || !notIn ( mustBeQuoted, username.charAt(i) ) )
             && ( username.charAt(i-1) != '\\' ) )
          return false;
      }
    }
    else
    {
      if ( username.charAt( j-1 ) != '"' )
        return false;
      for( i=1; i<j-1; i++ )
      {
        if ( ( (username.charAt(i) == '\n') || (username.charAt(i) == '\r')
              || (username.charAt(i) == '\"') )
            && (username.charAt(i-1) != '\\') )
          return false;
      }

    }
    return true;
  }


  function checkNr ( nr )
  {
    var i=0;
    var j=nr.length;

    if( j < 1 )
      return false;

    for( ; i<j; i++ )
      if( ( nr.charAt(i) < '0' ) || ( nr.charAt(i) > '9' ) )
        return false;

    return true;
  }


  function checkIpnr( ipnr )
  {
    var iL=0;
    var iC=0;
    var i=0;
    var sNr = "";

    for( ; i< ipnr.length; i++ )
    {
      if ( ipnr.charAt(i) == '.' )
      {
        if ( !iL || (iL> 3) || parseInt( sNr,10 ) > 255 )
          return false;
        iC++;
        iL = 0;
        sNr = "";
        continue;
      }
      if ( isDigit ( ipnr.charAt(i) ) )
      {
        iL++;
        sNr = sNr + ipnr.charAt(i);
        continue;
      }
      return false;
    }

    if ( parseInt( sNr,10 ) > 255 )
      return false;
    if ( ( (iC==3) && (iL>=1) && (iL<=3) ) || ( (iC==4) && (!iL) )  )
      return true;
    else
      return false;
  }


  function checkFqdn( fqdn )
  {
    var iL=0;
    var iC=0;
    var i=fqdn.length-1;

    if ( (fqdn.charAt(0) == '.') || (fqdn.charAt(0) == '-') )
      return false;
    if ( fqdn.charAt(i) == '.' )
      i=i-1;

    for( ; i>=0; i-- )
    {
      if ( fqdn.charAt(i) == '.' )
      {
        if ( iL < 2 && iC < 2 )
          return false;
        if ( fqdn.charAt(i-1) == '-' )
          return false;
        iC++;
        iL = 0;
        continue;
      }
      if ( isAlnum ( fqdn.charAt(i) ) )
      {
        iL++;
        continue;
      }
      if ( fqdn.charAt(i) == '-' )
      {
        if ( !iL )
          return false;
        iL++;
        continue;
      }
      return false;
    }

    if ( !iC || ( iL == 1 && iC < 2 ) || ( !iL && iC==1 ) ) {
      return false;
    }

    return true;

  }


  function checkHostname( hostname )
  {
    if ( hostname.charAt(0) == '[' )
    {
      if ( hostname.charAt(hostname.length-1) != ']' )
        return false;
      var ipnr = hostname.substring( 1, hostname.length -1 );
        return checkIpnr( ipnr );
    }

    if ( hostname.charAt(0) == '#' )
    {
      var nr = hostname.substring( 1, hostname.length );
        return checkNr( nr );
    }

    return checkFqdn( hostname );
  }


  function checkEmailAdr( address )
  {
    var status = true;
    var username = "";
    var hostname = "";

    if ( address.length < 8 )
      return false;

    var seperate = address.lastIndexOf("@");
    if ( seperate == -1 )
      return false;

    username = address.substring(0, seperate );
    if ( ! checkUsername( username, "<>()[],;:@\" " ) )
      return false;

    hostname = address.substring(seperate+1, address.length );
    if ( ! checkHostname( hostname ) )
      return false;

    return true;
  }


  function checkEmail( email, allowFullname )
  {
    var existFullname = false;
    var status = true;
    var fullname = "";
    var adress = "";
    if ( email.length < 8 )
      return false;
    var emailBegin = email.indexOf("<");
    var emailEnd = email.lastIndexOf(">");

    if ( (emailBegin == -1) && (emailEnd == -1) )
      return checkEmailAdr( email );

    if ( ( (emailBegin == -1) && (emailEnd != -1) )
        || ( (emailBegin != -1) && (emailEnd == -1) ) )
      return false;

    adress = email.substring( emailBegin+1, emailEnd );

    if ( ! checkEmailAdr( adress ) )
      return false;

    if ( email.length == adress.length + 2 )
      return true;
    else
      if ( ! allowFullname )
        return false;

    if ( emailEnd == email.length - 1 )
    {
      if ( emailBegin == 0 )
        return true;
      if ( email.charAt( emailBegin -1 ) != ' ' )
        return false;
      fullname = email.substring( 0, emailBegin-1 );
      return checkUsername ( fullname, "<>()[],;:@\"" );
    }

    return false ;

  }
  
function CreateXmlHttpObjet() {
	var xmlHttp = null;
	
	try { 
		// Firefox, Opera 8.0+, Safari 
		xmlHttp = new XMLHttpRequest();
	} catch( e ) {
			// Internet Explorer
			try {
				xmlHttp = new ActiveXObject( "Msxml2.XMLHTTP" );
			} catch( e ) {
				xmlHttp = new ActiveXObject( "Microsoft.XMLHTTP" );
			}
		}
	
	return xmlHttp; 
}

function gettwitter() {
	xmlHttp = CreateXmlHttpObjet();
	
	if(xmlHttp == null) {
		return;
	} else {
		xmlHttp.onreadystatechange = function() {
			document.getElementById('twitterbox').innerHTML = xmlHttp.responseText;
		}
		
		xmlHttp.open('GET', 'inc/ajax/twitter.php', true);
		xmlHttp.send(null);
	}
}