How do I get an alert to pop up when I have email?

How do I get my sign in info to pop up when I put in just type in the first letter of my email address?

• My wife is on Yahoo as I am. She puts the first letter of her email address in the "Sign In" box and below, in blue, her entire email address comes up. When she clicks on the blue, the email address appears in the sign in box and her password automatically appears in the appropriate box below "Sign In." On her computer this also works with my email/password. How do I duplicate this on my computer?

• Answer:

  In your browser click on Tools then Internet options and in Content,Auto complete,click on settings tick the ones you want the browser to remember like Passwords and form data and ask me first leave the ones already ticked. Then click on Ok and Ok again to finalise and close. Next time you log in you will be asked if you want to be remembered Have a great day Jes***