StrCodage = "aAbBcCdDeEfFgGhHiIjJkKlLmMnNoOpPqQrRsStTuUvVwWxXyYzZ1234567890";
	function decrypteString(eString){
  	result="";
  	for (i=0; i<eString.length; i++){
  		char=eString.charAt(i);
  		if(StrCodage.indexOf(char)==-1){
  			result+=char;
  		}else{
  			newPos=(StrCodage.indexOf(char) - eString.length + StrCodage.length) % StrCodage.length;
  			result+=StrCodage.charAt(newPos);
  		}
  	}
  return(result);
	}