gistfile1.txt

function rot13(str) { // LBH QVQ VG!
  var i=0,j=0;var newstr=[];
  while(i<str.length){
	  if(str.charCodeAt(i)>64&&str.charCodeAt(i)<78){
		  //(str.charCodeAt(i)<77){
		  
          //newstr[i]=str.charCodeAt(i)+13;
		   j=str.charCodeAt(i)+13;
		  //console.log(j);
		  //console.log(String.fromCharCode(newstr[i]));
		  newstr.push(String.fromCharCode(j));
		  
		  //console.log(newstr);
	  }
	  else if(str.charCodeAt(i)>77||str.charCodeAt(i)<90){
		   j=str.charCodeAt(i)-13;
		   newstr.push(String.fromCharCode(j));
		  //newstr[i]=str.charCodeAt(i)-13;
		  //console.log(String.fromCharCode(newstr[i]));
		  //newstr.push(String.fromCharCode(newstr[i]));
		  //console.log(newstr);
		  
	  }
	  else{
		  newstr.push(" ");
	  }
	  
  i++;
  }
  return newstr.join("");
  console.log(newstr.join(""));
}
  /*console.log(newstr);
  while(i<str.length){
	  
	  if(newstr.charCodeAt(i)>77)
	  {
         j=j-13;
		console.log(String.fromCharCode(newstr[i]));
	  }
	 else
	 {
		 j+=13;
	 console.log(String.fromCharCode(newstr[i]));
	 }
	
    i++;
  }
  
  //return String.fromCharCode(j);
}
}*/

// Change the inputs below to test
rot13("SERR PBQR PNZC");