Finally, I wrote a Greasemonkey script. The script is target on a Chinese comic website. You can download the script here. I wrote the script because the links are not named in sequence. To offline read the comic, I would like to download the comic first. Then I can read the comic offline. After that, I can delete the comic.

But the name are not in sequence, I cannot download the comic using batch downloading. Thus, writing this script to produce the link, then from the link, I can download the comic with any download manager.