In Web application you should check additional cases that you don't use in windows application such:

1. Checking the application in all Internet Explorer version (or from version that your application should support until the last version)

2. Fire Fox browser (in case that your application should support)

3. Netsape browser (in case that your application should support)

4. All Windows platforms ( Win95 + Win98 +.... - or from version that your application should support until the last version + Service Pack versions)

5. Checking your application with Internet Options

6. Checking your application with different windows resolution and settings

validation is the process confirming to the user requirements.

verification is the preocess confirming that software meets its specifications.

in simple words

verification means r we building the product right?

validation means r we building the right product?

diff b/w verification and validation?

verification: whether the product is suitable for customer reqirement or not.

validation: whether the product is valid or not.

Verification:

a)are we building the right product.

b)involves static methods like walkthroughs and reviews inspections.

Validation:

a)are building product right or not.

b)involves dynamic methods i.e. actual system testing.

Verification ensures that the system complies with organizations standards & processess relying on the review of non executable methods.i.e by static methods

It is simply verifying Are we building the right product

Validation ensure s that system operates according to the plan by executing the system function through a series of test that can be observed & executed.

It is Are we building product rightly.