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How to populate one drop-down from another drop-down selection?

Posted on 2008-06-12
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Last Modified: 2012-08-13
I have 1 drop-down (select box) that gets populated by a query from my db table.
This part is working fine.

I have a 2nd drop-down (select box) that I need to populate based upon the user's selection from the 1st drop-down

The first drop-down is for SYSTEM field from the query, and the 2nd drop-down should also come from a query based upon the SYSTEM'S associated SUBSYS field.

How can I do this?
Any help will be much appreciated.
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Question by:g118481
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Expert Comment

by:Melih SARICA
ID: 21774230
ajax would solve ur problemm..
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David S. earned 250 total points
ID: 21774515
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by:g118481
ID: 21775290
Kravimir,

The link you provided as an example is in PHP.
I can only use Javascript and JAVA/JSP coding.

I want a script with two chained selects, the first one is for a main category, all the categories are extracted from a database.
The second select contains subcategories which are also selected from a database, based on the system from the first select.

Does anyone have an example in JAVA/JSP?
I really need to get this working ASAP.


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LVL 36

Expert Comment

by:Loganathan Natarajan
ID: 21776144
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Assisted Solution

by:Loganathan Natarajan
Loganathan Natarajan earned 250 total points
ID: 21776159
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Author Comment

by:g118481
ID: 21777891
I am looking for a JAVA or JSP solution, only.
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Expert Comment

by:Melih SARICA
ID: 21778117
check logudotcom 's solution
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Author Comment

by:g118481
ID: 21790346
I have asked for an example that is JAVA or JSP.
I cannot install any new class files to support anything than basic JAVA or JSP.

If a solution is not possible using JAVA or JSP, then is there a solution, where I can have the user select the SYSTEM from the select box, then go back to the server for the SUBSYSTEMS for that SYSTEM, and return the user to the web page form and fill the SUBSYSTEM select box for the user to select?
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Expert Comment

by:Loganathan Natarajan
ID: 21790687
It doesn't mean that you cannot to do it with purely with JSP ... it is very much easy to do with DWR such AJAX frameworks ... it is advanced also...  if u do it with JSP means it is again the old convention will be applied ..

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Author Comment

by:g118481
ID: 21792831
Loqudotcom,

With your suggestion, I have to load/install class files, etc., correct?
Well, I cannot do this, as I am using WebSphere Application Server on the mainframe Z/OS.  It would take weeks to get the admin to install any files necessary to run DWR, and I do not have the luxury of time here.
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