I was searching for a drop down list script that auto-updates the content below

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Asked: June 6, 20262026-06-06T13:13:45+00:00 2026-06-06T13:13:45+00:00

I was searching for a drop down list script that auto-updates the content below

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I was searching for a drop down list script that auto-updates the content below the drop-down list in several sub-drop down lists derived from the choice made in the initial drop-down list selection.

I tried out the script at http://www.javascriptsource.com/forms/dynamic-drop-down-list.html and spent 6 hours trying to make it work in my favour, but I have come to the conclusion that I am definitely doing something wrong and would need help.

I would like to start off with a drop-down list that contains “Classes” of a computer that can be built. For instance; Ultimate, High, Mid, Low. When a user selects one of those options, the below drop-down unlocks, giving new options, and when that option is chosen the below updates, etc, etc till the last item which is the end of the form.

It is a project to allow a user to build a PC for themselves, but owing to the fact that a motherboard has certain limitations such as RAM amount or CPU allowance the drop-down that houses RAM/CPU would have to adapt to the motherboard chosen, etc.

A basic layout I have in mind is;

Please choose a Class

[Dropdown 1 “Class”]

Ultimate
High
Medium
Low

[Dropdown 2 “Motherboard”]

Content

[Dropdown 3 “RAM”]

Content

[Dropdown 4 “CPU”]

Content

[Dropdown 5 “Optical Drives”]

Content

[Dropdown 6 “Hard Drives”]

Content

[Dropdown 7 “Chassis”]

Content

[Dropdown 8 “Power Supply”]

Content

Etc. So when lets say you have a motherboard that only support 8GB of RAM, then the RAM sub-dropdown would show options 2GB, 4GB and 8GB, but not additional options such as 16GB or 32GB. The drop-down shouldn’t be locked to just 1 drop-down, but be flexible throughout in case motherboard/cpu/ram incompatibilities and hence some items need to be locked out.

Perhaps make a list of items that can be made under category “Ultimate” and make my way down to “Low”?

If anyone could assist me with this, I would greatly appreciate it, even point me in a direction of a similar project of which the above has been accomplished.