Select value from one combo to another combo

[expertalert]

Hi ,
i am an occational php programmer currently to a project

and stuck with this requirement .
Basically, there will be 3 combo box, and 2nd combo box will be populated s from the value of first combo and 3rd combo box will be populated from the value of 2nd combobox.

i have found this code from here, its 2 combo box
http://www.c-sharpcorner.com/UploadFile ... er-in-php/

but the problem is, when i am creating a third combo then value always stays from the first combo.

i think i know where is the problem its becasue of "document.frm.submit();"

Can any one please help with this problem ?? what shall i do to get my result ??

Thanks

[seandisanti]

AJAX, Javascript, Jquery. (in this case that's kind of the same answer 3 times, but yeah).

Personally I like jquery, but there are plenty of ways to do what you want with javascript. here's an example from another thread where someone wanted textboxes whose values each changed depending on the values contained within the other. viewtopic.php?f=2&t=21412 you should be able to modify that one to do what you want

[seandisanti]

Yeah, even in the code you'd linked to, they have the javascript doing the work.