/* E-Mail Adressen Überprüfung  */
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 ;

  }

/* Ende der E-Mailadressen ü+berprüfung */
function einblenden(id_name, class_name) {

document.getElementById(id_name).className = class_name;

}

function ausblenden(id_name, class_name) {

document.getElementById(id_name).className = class_name;

}

function checkenSeiteEins() {
	if($F("artikelnummer") == "" && $F("kundennummer") == "" )
		{
		$("seiteEins").style.visibility = "hidden";
		$("anfrage_2").style.visibility = "visible";
	}
	else {
		$("seiteEins").style.visibility = "hidden";
		$("anfrage_2").style.visibility = "visible";
	}

}



function checkenSeiteZwei(wert, einblenden, ausblenden) {
fehler = false;

	switch(wert) {
		case "zurück": $(ausblenden).style.visibility = "hidden";
			$(einblenden).style.visibility = "visible";
		break;
		
		case "zweiteSeiteOhneKdnrArtnr": 
			if($F("artikelart") == "n")
				{
				$("artikelart").style.backgroundColor = "#cc0000";
				fehler = true;
				}
			else{
				$("artikelart").style.backgroundColor = "#ffffff";
				}
	
			if($F("material") == "n")
				{
				$("material").style.backgroundColor = "#cc0000";
				fehler = true;
				}
			else{
				$("material").style.backgroundColor = "#ffffff";
				}
			
			if($F("rohm2") == "")
				{
				$("rohm2").style.backgroundColor = "#cc0000";
				fehler = true;
				}
			else{
				$("rohm2").style.backgroundColor = "#ffffff";
				}

			if($F("fertigm2") == "")
				{
				$("fertigm2").style.backgroundColor = "#cc0000";
				fehler = true;
				}
			else{
				$("fertigm2").style.backgroundColor = "#ffffff";
				}
				
			if($F("rohbreite") == "")
				{
				$("rohbreite").style.backgroundColor = "#cc0000";
				fehler = true;
				}
			else{
				$("rohbreite").style.backgroundColor = "#ffffff";
				}
			
			if($F("fertigbreite") == "")
				{
				$("fertigbreite").style.backgroundColor = "#cc0000";
				fehler = true;
				}
			else{
				$("fertigbreite").style.backgroundColor = "#ffffff";
				}
			
			if($F("aufmachnung") == "n")
				{
				$("aufmachnung").style.backgroundColor = "#cc0000";
				fehler = true;
				
				}
			else{
				$("aufmachnung").style.backgroundColor = "#ffffff";
				}
			
				
			if(fehler == true) {
			$("fehlerda").style.visibility = "visible";
			
			}
			if(fehler == false) {
				$(ausblenden).style.visibility = "hidden";
				$(einblenden).style.visibility = "visible";
				$("fehlerda").style.visibility = "hidden";
			}
		break;
		
		case "dritteSeiteOhneKdnrArtnr": 
					
			
			if(fehler == true) {
			$("fehlerda").style.visibility = "visible";
			
			}
			if(fehler == false) {
				$(ausblenden).style.visibility = "hidden";
				$(einblenden).style.visibility = "visible";
				$("fehlerda").style.visibility = "hidden";
			}
		break;

		case "versenden": 
			if($F("firmenname") == "")
				{
				$("firmenname").style.backgroundColor = "#cc0000";
				fehler = true;
				}
			else{
				$("firmenname").style.backgroundColor = "#ffffff";
				}
	
			if($F("strasse") == "")
				{
				$("strasse").style.backgroundColor = "#cc0000";
				fehler = true;
				}
			else{
				$("strasse").style.backgroundColor = "#ffffff";
				}
			
			if($F("plz") == "")
				{
				$("plz").style.backgroundColor = "#cc0000";
				fehler = true;
				}
			else{
				$("plz").style.backgroundColor = "#ffffff";
				}

			if($F("ort") == "")
				{
				$("ort").style.backgroundColor = "#cc0000";
				fehler = true;
				}
			else{
				$("ort").style.backgroundColor = "#ffffff";
				}
				
			if($F("land") == "")
				{
				$("land").style.backgroundColor = "#cc0000";
				fehler = true;
				}
			else{
				$("land").style.backgroundColor = "#ffffff";
				}
			
			if(document.anfrage_frank.anrede[0].checked == false && document.anfrage_frank.anrede[1].checked == false)
				{
				$("anrede").style.backgroundColor = "#cc0000";
				$("anrede").focus();
				fehler = true;
				}
			else{
				$("anrede").style.backgroundColor = "#ffffff";
				}
			
			if($F("vorname") == "")
				{
				$("vorname").style.backgroundColor = "#cc0000";
				fehler = true;
				}
			else{
				$("vorname").style.backgroundColor = "#ffffff";
				}
			
			if($F("nachname") == "")
				{
				$("nachname").style.backgroundColor = "#cc0000";
				fehler = true;
				}
			else{
				$("nachname").style.backgroundColor = "#ffffff";
				}
				
			if($F("tele") == "")
				{
				$("tele").style.backgroundColor = "#cc0000";
				fehler = true;
				}
			else{
				$("tele").style.backgroundColor = "#ffffff";
				}
				
			if($F("fax") == "")
				{
				$("fax").style.backgroundColor = "#cc0000";
				fehler = true;
				}
			else{
				$("fax").style.backgroundColor = "#ffffff";
				}
			
			if($F("email") == "")
				{
				$("email").style.backgroundColor = "#cc0000";
				fehler = true;
				}
			else{
				$("email").style.backgroundColor = "#ffffff";
				}
			
			if (!checkEmail($F("email"), true ))
				{
				$("email").style.backgroundColor = "#cc0000";
				fehler = true;
				}			
			else{
				$("email").style.backgroundColor = "#ffffff";
				}
				
			if(fehler == true) {
			$("fehlerda").style.visibility = "visible";
			return false;
			}
			if(fehler == false) {
				$(ausblenden).style.visibility = "hidden";
				$(einblenden).style.visibility = "visible";
				$("fehlerda").style.visibility = "hidden";
			}
		break;
		
	} 

}