Grants a webmaster the ability to read properties of any HTML files on a user's hard drive. In particular, the webmaster can access links from the user's bookmark file, or access HTML files in the user's cache directory and retrieve the titles of these pages to determine the user's surfing history.
document.cookie = "jscookie=\<script\>alert('hello world')\</script\>;expires=Fri, 31 Dec 2000 23:00:00 GMT;domain=.peacefire.org;path=/"will cause the line
<script>alert('hello world')</script>to appear in the file
and another frame points to the file that the webmaster wants to read, in this case: