CSS HTML Validator

In my early days I used to play around with java-scripts codes available at www.dynamicdrive.com . You can find thousands of free codes . Just download them and try modify them as per your need.

Yes I think you should focus on quality of links. Try getting back-links from relevant websites . Also you can check website power at sites like checkpagerank.net. Avoid links from Spam directories or classified websites. Try and focus more on quality guest blogging and commenting.