对cookie进行编解码用到的函数escape,unescape

<script>
  alert(escape('abc123'))// escape对非ASCII字符进行编码，如空格等
  alert(escape('a b c')+"-"+unescape('a b c'))// unescape解码
  alert(escape('@a,b.c!')+"-"+unescape('@a,b.c!'))
</script>