Symantec has AV signatures for different types of threats that can be loaded into HTML pages. If the threat lives in Java or other types of applications, Symantec should protect you. When you are storing those pages on your local system, as long as you do not load the page in a browser you are safe, as the malicious code cannot execute by itself. Do not click any links that may have been added or altered until you made sure the URL is correct.
In the future please visit the Norton Community for your Norton questions.
http://community.norton.com/norton/
Best,
Thomas