How to block a friend in a friend list?

I want to block someone in my friend list so how can i do this?

• he is irritating me when i become online and i really want to get rid of him so tell me how can block him ?

• Answer:

  TO BLOCK SOMEONE IN MAIL CHAT Go to "Options" >Click on "More Options">Click on "Spam". Under "Blocked Chat ID's">choose one of the options given. Either "Block chat messages from anyone who is not in my Contacts" or "Block chat messages only from the people listed below:". If you use this option add the person in the box. Click on "Save Changes" at the top. TO BLOCK AN EMAIL ADDRESS If you are using Yahoo Classic: Go to "Options" (It is above your E-mail) >Click on "Mail Options">Click on "Blocked Addresses". Enter the address you want to block>Click on “Add Block”>Click on “Save” If you are using New Yahoo Mail Go to "Options" >Click on "More Options">Click on "Spam". Enter the address you want to block>Click on “Add ”>Click on “Save Changes” TO BLOCK SOMEONE IN YAHOO MESSENGER: Right click on his name in the Messenger Window and then click on "Delete". (Make a note of the person's ID). Then add him to your "Ignore List" as follows: Click on "Messenger" in the top left hand corner. Click on "Preferences". Click on "Ignore List". Click on "Ignore only the People Below". Add the person in the white box and click on "Add". Click on "Apply" followed by "OK".