To escape the cookie function codec used, unescape

<Script> 
  Alert (Escape ( 'abc123')) // Escape encoding of non-ASCII characters, such as spaces 
  alert (escape ( 'ab c' ) + "-" + unescape ( 'ab c')) // unescape decoding 
  Alert (Escape () + '@ A, BC!' "-" '! @ A, BC' + unescape ()) 
</ Script>