//*** 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.)

//Returns the Rot13 equivalent of a string
String.prototype.rot13 = function(){
	var str = this.valueOf();
	var i,len,x,rot,tor;
	rot="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
	tor=rot.split(/(.{13})/);
	tor=[].concat(tor[3],tor[1],tor[7],tor[5]).join('').split('');
	for (i=0,str=str.split(''),len=str.length;i<len;i++) if ((x=rot.indexOf(str[i]))>-1) str[i]=tor[x];
	return str.join('');
}