in web site testing we perform smoke, 
sanity,performance,load,functional,regression etc Yes we 
perform web site testing manually simply click all the link 
and check that link perform required function or not check 
all the link like this only .

Website testing can be done manually.
We can perform Testing by simply checking all the buttons 
are proper or not,clicking on all the links and checking 
whether the appropriate page is opened or not,checking 
whether all major functionalities are working properly or 
not,checking for performance,checking for security,checking 
for different loads,checking for alignments,design,checking 
for usability etc.

you can test a website manually.
Open a website u shld be able to view all the features, no
overlapping, shld have same font,when u click on a link u
shld be able to see that particular page displayed agin with
proper format,font and u shld have a link to go back to home
page. 

Criteria: Here main point is to do Usability testing(is it
user friendly), compatibility(works in all environment
Eg:any windows platform either Xp,windows 2000 etc),

Testing Website manually is little bit difficult tasks but not impossible.
1.There are three section in any website Header, Footer, Left side menu,right side menu & hyperlinks 
2.Check proper format,font, color combination
3.Check is there facility to go home from every display page or not.
4.Check compatibility(works in all environment
(eg:any windows platform e like Xp,windows 2000 etc, browsers(mozilla,crome,opera,Netscape)
5.Check user friendlyness in website. 
6.IF u hv access of DB then u can Check whether data is properly saved in DB or not.