I'm looking to fill out an input box, and onBlur get info from the database and echo it. Very similar to how you register on this site, when you fill out a username, onBlur it checks to see if the username is available and echos yes or no.

I want to fill out a username, and when you click out of the textbox, echo the First and Last name if it exists.

 

any help on how to do this at all if very appreciated! :)