Hello i forget my password and my all other details in yahoo mail so how can i get the same

Open a free Gmail or windows live account. Then contact yhoo from your web mail, tell them you forgot your password, and they should ask you a couple of questions, and either email you the necessary password. That's how most of the work, like my hotmail address got lost and they sent it back on my pop3 account. You probablly have a POP3, That one is easier to verify for them, so if you have outlook or outlook express, it should take an couple of hours, with web mail like yhoo and gmail, it takes longer for them to verify. But do yourself a favor and get a gmail-Google account, if you use google as your primary search engine, you can sign in once and forget it, as it will sign you in on your browser, good luck