This page gives you an introduction to Web security. We give you a sample username and password to try out. Not all Web browsers provide user authentication. If yours doesn't, you're out of luck here.
Some browsers handle authentication poorly.
If you switch from one document to another, and they have different passwords, the browser's response can be confusing. You should click YES if this happens, then enter the username and password for the new document. In the example above, you entered a username and password to access a protected document. For example, the username itself could be used by the server to decide what application or document to display next. For example, a CEO might belong to all user groups, and thereby have access to all of the company's Web resources.