//*** This code is copyright 2003 by Gavin Kistner, !@phrogz.net
//*** It is covered under the license viewable at http://phrogz.net/JS/_ReuseLicense.txt
//*** Reuse or modification is free provided you abide by the terms of that license.
//*** (Including the first two lines above in your source code satisfies the conditions.)

//For each char in srcChars in a string, replaces it with the corresponding char in rplChars
String.prototype.encryptify = function(){
	var sourceString = this;
	var idx,thisChar;
	var srcChars = "abcdefghijklmnopqrstuvwxyz";
	var rplChars = "zyxwvutsrqponmlkjihgfedcba";
	var newString="";
	for (var i=0,len=sourceString.length;i<len;i++) newString+= ((idx = srcChars.indexOf(thisChar=sourceString.charAt(i)))!=-1?rplChars.charAt(idx):thisChar);
	return newString;
}

var whatTheySaid = prompt("What's the magic word?");
var encryptedWord = whatTheySaid.encryptify();


//The same function as the above, written out for clarity
function Encryptify_LongHand(sourceString){
	var idx,thisChar;
	var srcChars = "abcdefghijklmnopqrstuvwxyz";
	var rplChars = "zyxwvutsrqponmlkjihgfedcba";
	var newString="";
	for (var i=0,len=sourceString.length;i<len;i++){
		var thisChar=sourceString.charAt(i);
		var idx=srcChars.indexOf(thisChar);
		if (idx!=-1){
			//this is a special replaceable character
			newString+=rplChars.charAt(idx);
		}else{
			//I don't know how to encode this character, so I'll just append it.
			newString+=thisChar;
		}
	return newString;
}