Tips to Evaluate a Website:
Authorship : Is the author, writing an article, an expert in the field? What are his credentials?
Publisher : Is it a renowned publisher--the organization or the institute that publishes websites?
Currency: How current is the information found on the website? Is it up-to-date?
Accuracy: How accurate is the information (are the authors experts in the field?)
Bias: Is the website displaying any kind of bias--are the owners trying to promote their products?