[SOLVED] Dynamically populate text field

[ashrobbins87]

Is it possible to dynamically populate a text field, based on the content of other text fields on the same page?

 

For example I have a firstname field and a surname field, and I want to populate a username field with the first letter of the firstname and the first 7 letters of the surname so that the user can see it.

 

firstname: ashley

surname: robbins

 

username: arobbins

 

Can this be done??

[wildteen88]

if this is done while the user is typing their first/surename you wont be able to do this with PHP. You'll have to use javascript for this.

[ashrobbins87]

Ok great at least I now know its possible. I take it this can be done without the need to refresh the page? Can anyone point me in the direction of where to start??

[mrMarcus]

you will most likely needs things like getElementById() and onChange() / onKeyUp() .. those are in the javascript library.

 

javascript has string length functions like PHP, so you can use that to get the appropriate number of letters from the name(s) and then join them.

 

i'd actually say, look into AJAX and PHP to get this done if you are already with PHP.

[ashrobbins87]

Thanks guys for the help, I've sorted it now and you're right I had to use byElementID and onKeyUp