AJAX Field Check

hughesdesigns

hi i have a registeraton system and im trying to write a script that will enable users to automaticlly check to see it the username is available now i personally thought that ajax would be best fro this bt as im still learning ajax and what fun it is 🙂 i sed a bit of asistance in what i need to do for this to work any ideas ?? thankas bill

NogDog

Is there a specific part ot the process you don't understand, or are you asking for a general, high-level design for this functionality, or what? The more specific you can make your question, the more likely it is to get a specific answer. It may also help to show us what you've coded so far.

Another thing to consider, do you really gain anything from this separate "availability" process versus simply having the user submit his registration, then if the user name is already in use just returning to the registration form with an appropriate error message?

hughesdesigns

well yeah i need some idea of what i need to do basicly i want to beable to type my username in and for it to automaticcly check the DB to see if its available im crap at explaining things sorry about that

m_tt

I think this tool is a great way to start learning AJAX, give it a shot.

The Ultimate Ajax Object

NogDog

Basic process: assign an onchange or onblur event to the user name input field that will call your AJAX javascript function. That function sends the value of the input field to a PHP script on the server, which would query the DB to see if there is a match, and return some sort of found/not-found response back to the client. Your AJAX response handler would then use that result in a simple if condition to output the desired "already used" response if it was found. (This could simply be a javascript alert() pop-up, or it could be an HTML/CSS change to the actual page [i.e.: a DHTML sort of thing].)