/******************************************************
Find and retrieve the encryption key automatically 
Note: This is a draft version, please help to modify, Thanks!
******************************************************/
function keyFinder(){
 	var result = "";
	var key = 0;
	var wordbank =["is","Is","am","Am","are","Are","have","Have","has","Has","may","May","be","Be"];
 	var shiftNum = 0; //count the number of key shifted
	var str = document.getElementById("encryptedID").value; //get the input string
	var inStr = str.toString(); //convert the input to String
	var outStr = ""; // store the output value
 	document.getElementById("debug").innerHTML = shiftNum;
 	for (var i=0; i<26; i++){
		outStr = caesarCipherEncodeAndDecodeEngine(inStr,i); // use the encrytpion engine to decrypt the input string, shiftNum=i
		for ( var i=0; i<wordbank.length; i++){
			if (wordbank[i] == outStr[i]+outStr[i+1]{
        key=i;
      }
		}
 	}
 	return key;
}