Facebook assigns each new user a unique identification number. You use this identification number in the Facebook URL to find a user. The user's profile displays, and you can submit a Facebook friend request or read the user's Wall posts using the identification number in the URL's "ID" querystring.
Open a Web page, and navigate to the Facebook main website at facebook.com.
Log in to your Facebook account. In the upper-left corner click your name next to your Facebook Wall photo. Notice the URL contains your Facebook ID.
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Replace your Facebook ID in the URL with your friend's ID. The following URL is an example of a Facebook URL with a user's ID inserted in the "ID" value:
Replace "100001222333" with your own ID.
Press "Enter" to navigate to the user's Facebook Wall.