// JavaScript Document

start_2 = new Image();
start_2.src = "bilder/start-02.jpg";
buecher_2 = new Image();
buecher_2.src = "bilder/buecher-02.jpg";
kaufen_2 = new Image();
kaufen_2.src = "bilder/kaufen-02.jpg";


  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 pruefen()
{
		
	if(document.Formular.vorname.value == ""){
		alert("Bitte einen Vornamen eingeben!");
		document.Formular.vorname.focus();
		return false;
	}
	if(document.Formular.nachname.value == ""){
		alert("Bitte einen Nachnamen eingeben!");
		document.Formular.nachname.focus();
		return false;
	}
	if(document.Formular.strasse.value == ""){
		alert("Bitte eine Straße eingeben!");
		document.Formular.strasse.focus();
		return false;
	}
	if(document.Formular.plz.value == ""){
		alert("Bitte eine Postleitzahl eingeben!");
		document.Formular.plz.focus();
		return false;
	}
	if(document.Formular.ort.value == ""){
		alert("Bitte einen Ort eingeben!");
		document.Formular.ort.focus();
		return false;
	}
	if(document.Formular.emailadresse.value == ""){
		alert("Bitte eine Emailadresse eingeben!");
		document.Formular.emailadresse.focus();
		return false;
	}else{
		if ( ! checkEmail( document.Formular.emailadresse.value, true ) ) {
          alert ("Ihre E-Mail-Adresse ist syntaktisch falsch!");
		  document.Formular.emailadresse.focus();
          return false;
        }
	}
	if(document.Formular.telefon.value == ""){
		alert("Bitte eine Telefonnummer eingeben!");
		document.Formular.telefon.focus();
		return false;
	}
	
}

function pruefe_aktion()
{		
	if(document.Formular.aufmerksamgeworden.value == "Frankfurter Buchmesse"){
		var gdiv = document.getElementById("gutscheindiv");
		var gdiv2 = document.getElementById("gutscheindiv2");
		gdiv.style.display = "block";
		gdiv2.style.display = "block";
		document.Formular.gutscheincode.focus();
		return false;
	}else{
		var gdiv = document.getElementById("gutscheindiv");
		var gdiv2 = document.getElementById("gutscheindiv2");
		gdiv.style.display = "none";
		gdiv2.style.display = "none";
	}
}

function pruefe_gutscheincode()
{
	if(MD5(document.Formular.gutscheincode.value) == "7942f20c5e8a685e56dc42ad58bfb631"){
		document.images["gutscheinstatus"].src = "bilder/knoepfe/haken.jpg";
	}else{
		document.images["gutscheinstatus"].src = "bilder/knoepfe/loeschen.jpg";	
	}
}
function pruefe_gutschein(){
	             code = document.getElementById('gutscheincode').value;
                 var req = null;

                try{
                    req = new XMLHttpRequest();
                }
                catch (ms){
                    try{
                        req = new ActiveXObject("Msxml2.XMLHTTP");
                    } 
                    catch (nonms){
                        try{
                            req = new ActiveXObject("Microsoft.XMLHTTP");
                        } 
                        catch (failed){
                            req = null;
                        }
                    }  
                }

                if (req == null)
                  alert("Error creating request object!");
			  	  //url = 'gutschein_pruefen.php?code='+code;
				  var url = 'gutschein_pruefen.php';
				  var params = 'code='+code; 
				  req.open("POST", url, true);
				  req.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
				  req.setRequestHeader("Content-length", params.length);
				  req.setRequestHeader("Connection", "close");
				  
				  
                   req.onreadystatechange = function(){            
                    
					switch(req.readyState) {
                            case 4:
								if(req.status!=200) {
									alert("Fehler:"+req.status); 
								}else if(req.responseText==1){    
									document.images["gutscheinstatus"].src = "bilder/knoepfe/haken.jpg";
								}else{
									document.images["gutscheinstatus"].src = "bilder/knoepfe/loeschen.jpg";
								}
								break;
                            default:
                                return false;
                            break;     
                        }
                    };
				req.send(params);
            }
			
function ecardpruefen(){
	var div = document.getElementById("tabzusatzecards");
	if(div.style.display == "none")
	{
		div.style.display = "block";
		//location="#fuss";
		//location.hash="#fuss";
		//self.location.href="#fuss";
	}
	else
	{
		div.style.display = "none";
	}	
}

function toggledisplay (id){		
        if (document.getElementById) {
       		var mydiv = document.getElementById(id);
  		mydiv.style.display = 'none';
	}
}