paste 
// Generic javascript rot function needed for rot13
function rot( t, u, v ) { return String.fromCharCode( ( ( t - u   v ) % ( v * 2 ) )   u ); }
 
// Rot13 function for javascript
function rot13(s){
	var b = [], c, i = s.length,a = 'a'.charCodeAt(), z = a   26,	A = 'A'.charCodeAt(), Z = A   26;
	while(i--) {
		c = s.charCodeAt(i);
		if( c>=a && c
		else if( c>=A && c
		else { b[i] = s.charAt(i); }
	}
	return b.join( '' );
}
  1. // Generic javascript rot function needed for rot13
  2. function rot( t, u, v ) { return String.fromCharCode( ( ( t - u   v ) % ( v * 2 ) )   u ); }
  3.  
  4. // Rot13 function for javascript
  5. function rot13(s){
  6.         var b = [], c, i = s.length,a = 'a'.charCodeAt(), z = a   26,   A = 'A'.charCodeAt(), Z = A   26;
  7.         while(i--) {
  8.                 c = s.charCodeAt(i);
  9.                 if( c>=a && c
  10.                 else if( c>=A && c
  11.                 else { b[i] = s.charAt(i); }
  12.         }
  13.         return b.join( '' );
  14. }