function TPlausibility()
{
  var alphabetValueArray;
  var alphabetPosArray; // "u" ... don't use positions
  var minLen;
  var maxLen;

  this.Init=Init;
  this.Reset=Reset;
  this.SetMinLen=SetMinLen;
  this.SetMaxLen=SetMaxLen;
  this.AddChar=AddChar;
  this.AddCharAtPos=AddCharAtPos;				// Characters on these positions MUST exist (mind. 1 of the pos)
  this.AddSmallLetters=AddSmallLetters;
  this.AddBigLetters=AddBigLetters;
  this.AddNumbers=AddNumbers;
  this.AddUmlauts=AddUmlauts;
  this.LoadSettings_Tel=LoadSettings_Tel;
  this.LoadSettings_Zip=LoadSettings_Zip;
  this.LoadSettings_City=LoadSettings_City;
  this.LoadSettings_Street=LoadSettings_Street;
  this.LoadSettings_PersonName=LoadSettings_PersonName;
  this.LoadSettings_EMail=LoadSettings_EMail;
  this.Check=Check;
  this.ListAlphabet=ListAlphabet;

  this.Init();


  function Init() {this.Reset();}

  function Reset()
  {
    this.alphabetValueArray=new Array();
    this.alphabetPosArray=new Array();
    this.minLen=0;
    this.maxLen=65536;
  }

  function SetMinLen(value) {this.minLen=value;}

  function SetMaxLen(value) {this.maxLen=value;}

  function AddChar(value) {this.AddCharAtPos(value,"u");} // u...undefined

  function AddCharAtPos(value,pos) // negative positions: from last character. Example: "123456789" pos-3 ist the char "6"
  {
  	this.alphabetValueArray.push(value);
  	this.alphabetPosArray.push(pos);
  }

  function AddSmallLetters()
  {
  	var i;
  	for (i=97;i<=122;i++)
  	{
  		this.AddChar(chr(i));
  	}
  }

  function AddBigLetters()
  {
  	var i;
  	for (i=65;i<=90;i++)
  	{
  		this.AddChar(chr(i));
  	}
  }

  function AddNumbers()
  {
  	var i;
  	for (i=48;i<=57;i++)
  	{
  		this.AddChar(chr(i));
  	}
  }

  function AddUmlauts()
  {
  	this.AddChar(chr(223)); // ß
  	this.AddChar(chr(228)); // ä
  	this.AddChar(chr(246)); // ö
  	this.AddChar(chr(252)); // ü
  	this.AddChar(chr(196)); // Ä
  	this.AddChar(chr(214)); // Ö
  	this.AddChar(chr(220)); // Ü
  }

  function LoadSettings_EMail()
  {
  	this.SetMinLen(5);
  	this.SetMaxLen(100);
  	this.AddSmallLetters();
  	this.AddBigLetters();
    this.AddUmlauts();
  	this.AddNumbers();
  	this.AddChar("/");
  	this.AddChar("(");
  	this.AddChar(")");
  	this.AddChar("-");
  	this.AddChar(" ");
  	//this.AddChar("@");
  }

  function LoadSettings_Tel()
  {
  	this.SetMinLen(6);
  	this.SetMaxLen(25);
  	this.AddNumbers();
  	this.AddCharAtPos("0",0);
  	this.AddCharAtPos("+",0);
  	this.AddChar("/");
  	this.AddChar("(");
  	this.AddChar(")");
  	this.AddChar("-");
  	this.AddChar(" ");
  }

  function LoadSettings_Zip()
  {
  	this.SetMinLen(4);
  	this.SetMaxLen(10);
  	this.AddNumbers();
  	this.AddSmallLetters();
  	this.AddBigLetters();
    this.AddUmlauts();
  	this.AddChar("-");
  	this.AddChar("(");
  	this.AddChar(")");
  	this.AddChar(".");
  	this.AddChar(",");
  	this.AddChar(" ");
  }

  function LoadSettings_Street()
  {
  	this.SetMinLen(4);
  	this.AddNumbers();
  	this.AddSmallLetters();
  	this.AddBigLetters();
    this.AddUmlauts();
  	this.AddChar("-");
  	this.AddChar("/");
  	this.AddChar("(");
  	this.AddChar(")");
  	this.AddChar(".");
  	this.AddChar(",");
  	this.AddChar(" ");
  }

  function LoadSettings_City()
  {
  	this.SetMinLen(3);

  	var i;
  	for (i=33;i<=47;i++)
  	{
  		this.AddChar(chr(i));
  	}
  	for (i=58;i<=255;i++)
  	{
  		this.AddChar(chr(i));
  	}
  	this.AddUmlauts();
  	this.AddChar("-");
  	this.AddChar("/");
  	this.AddChar("(");
  	this.AddChar(")");
  	this.AddChar(".");
  	this.AddChar(",");
  	this.AddChar(" ");
  }

  function LoadSettings_PersonName()
  {
  	this.SetMinLen(3);

  	var i;
  	for (i=33;i<=47;i++)
  	{
  		this.AddChar(chr(i));
  	}

  	for (i=58;i<=255;i++)
  	{
  		this.AddChar(chr(i));
  	}
  	this.AddUmlauts();
  	this.AddChar("-");
  	this.AddChar("/");
  	this.AddChar("(");
  	this.AddChar(")");
  	this.AddChar(".");
  	this.AddChar(",");
  	this.AddChar(" ");
  }

  function Check(str)
  {
  	var i,j,charFound,posFlag=0,usePosMode=false,posCharAtThisChar;

    if (str.length<this.minLen) return false;
    if (str.length>this.maxLen) return false;

  	for (i=0;i<str.length;i++)
  	{
  		charFound=false;
  		posFlag=0;
  		posCharAtThisChar=false;
  		for (j=0;j<this.alphabetValueArray.length;j++)
  		{
  			if (str.charAt(i)==this.alphabetValueArray[j])
  			{
          charFound=true;
  			}

        if (usePosMode==false&&this.alphabetPosArray[j]!="u") usePosMode=true;

        if (this.alphabetPosArray[j]!="u")
        {
  				var tmpPos;
    			if (this.alphabetPosArray[j]<0)
    			{
    				tmpPos=str.length+this.alphabetPosArray[j];
    			}
 	  			else tmpPos=this.alphabetPosArray[j];


	  			if (tmpPos==i&&posFlag!=1)
 		  		{
 		  			posCharAtThisChar=true;
    	  		if (str.charAt(tmpPos)!=this.alphabetValueArray[j])
    	  		{
    	  			posFlag=-1;
    	  		}
  		    	else
  		    	{
  		    		posFlag=1;
  		    	}
  		    }
 				}
  		}

      if (usePosMode==true&&posFlag==-1&&posCharAtThisChar==true) return false;
      if (!charFound) return false;
  	}
    return true;
  }

  function ListAlphabet()
  {
    var i,tmpStr="";
  	for (i=0;i<this.alphabetValueArray.length;i++)
  	{
  		tmpStr+="char: "+this.alphabetValueArray[i]+" pos: "+this.alphabetPosArray[i]+"\n";
  	}
  	alert(tmpStr);
  }
}