.jar files, 198
.jav files, 198
.java files, 198
Java, IE settings for, 379
Javascript.dll file, 353
.jfif files, 198
John the Ripper program, 166, 176
.jpe files, 198
.jpeg files, 198
.jpg files, 198
.js files, 198
.jse files, 198
JS.Fortnight worm, 46