see on the top left corner of yahoo mail just next to the yahoomail u will find ure email id, next to it ofline or online(ure status) , below it sign out ,my account , mail classic .once u found that click to ure status and u ll get options , click online or available , and then to find ure friends,in the left side of the screen u can find contacts and weather anyone is on line .once u found the person u want to chat with clik on their name and u can chat through ure e mail