Accuracy
Who wrote this document? What makes the author qualified? Is a name/s and contact information given? Do you know why it was written?  

Authority
What person, organization, and or business published this webpage? What are their creditials?

Objectivity
Does this webpage read like an ad for something? Are there opinions expressed? Is there advertising? Why was this page written and for whom? 

Currency
When was this webpage published? Is it up-to-date?  

Coverage
What topics are covered? Can this information be found elsewhere? How in-depth is the material?