3. The method of claim 1 , wherein said analyzing offline comprises performing a search for specified expressions within said content from each said sample web page of said first sample set of web pages, wherein each specified expression from said specified expressions is selected from the group consisting of a phrase and a word, and wherein said specified expressions are divided into a first group of expressions that are of positive interest to a user of said web crawler and a second group of expressions that are of negative interest to said user.
3. The method of claim 1 , wherein said analyzing offline comprises performing a search for specified expressions within said content from each said sample web page of said first sample set of web pages, wherein each specified expression from said specified expressions is selected from the group consisting of a phrase and a word, and wherein said specified expressions are divided into a first group of expressions that are of positive interest to a user of said web crawler and a second group of expressions that are of negative interest to said user. 4. The method of claim 3 , wherein said analyzing offline further comprises determining if each said sample web page of said first sample set of web pages comprises a hyperlink to an alternative web page comprising an expression from said first group or said second group.