Updating drop down menu depending on another drop down menu

Question

Hi!
I'm making this questionnaire, and it has 10 questions (q01 to q10).
Each question has 4 sub-questions with an associated drop-down menu (q01L1 to q01L4, q02L1 to q02L4, etc.).
The values available to select from the drop-down menu are: 1, 2, 3, and 4.
For each sub-question, the user has to select a value (1, 2, 3, or 4), and that value can only be selected once for each question as a whole.
I suppose that JavaScript will be able to remove, update, or rebuild the other drop-down menus according to the answer given to each sub-question. How can it be achieved? I have no idea how to make that happen. Could you help?
Thanks.
For example :
This is what the user actually see BEFORE filling the question :
Question 1 : When disagreeing on points of view, I get influenced by
[Drop-down menu 1] : The tone/volume of voice of the person with whom I speak.
[Drop-down menu 2] : My capability or incapability to understand the point of view of the person with whom I speak.
[Drop-down menu 3] : The logic and the rationale on which the person with whom I speak bases his/her opinion.
[Drop-down menu 4] : Whether or not the person with whom I speak is sensible to what I may feel.
The following is for you to visualise the way I named the fields in the PDF questionnaire :
q01 : When disagreeing on points of view, I get influenced by
q01L1 {1,2,3,4} : The tone/volume of voice of the person with whom I speak.
q01L2 {1,2,3,4} : My capability or incapability to understand the point of view of the person with whom I speak.
q01L3 {1,2,3,4} : The logic and the rationale on which the person with whom I speak bases his/her opinion.
q01L3 {1,2,3,4} : Whether or not the person with whom I speak is sensible to what I may feel.
q01 = the name I gave to the question 1
L1 = the name I gave to the sub-question 1
q01L1 = the name I gave to the drop-drop menu of the sub-question 1 of the question 1
{1,2,3,4} = the answers the user can select from the menu.
The user can answer :
4 : The tone/volume of voice of the person with whom I speak.
2 : My capability or incapability to understand the point of view of the person with whom I speak.
1 : The logic and the rationale on which the person with whom I speak bases his/her opinion.
3 : Whether or not the person with whom I speak is sensible to what I may feel
But cannot answer :
4 : The tone/volume of voice of the person with whom I speak.
2 : My capability or incapability to understand the point of view of the person with whom I speak.
1 : The logic and the rationale on which the person with whom I speak bases his/her opinion.
4 : Whether or not the person with whom I speak is sensible to what I may feel
This is where the JavaScript comes into play. What can be done to remove, update, or rebuild the other drop-down menus according to the answer given to each sub-question?
If the user answers 4 to q01L1, the 3 other drop-down menus should look like this
4 : The tone/volume of voice of the person with whom I speak.
q01L2 {1,2,3} : My capability or incapability to understand the point of view of the person with whom I speak.
q01L3 {1,2,3} : The logic and the rationale on which the person with whom I speak bases his/her opinion.
q01L3 {1,2,3} : Whether or not the person with whom I speak is sensible to what I may feel.
And then, if the user answers 2 to q01L2, the 2 last drop-down menus should look like this
4 : The tone/volume of voice of the person with whom I speak.
2 : My capability or incapability to understand the point of view of the person with whom I speak.
q01L3 {1,3} : The logic and the rationale on which the person with whom I speak bases his/her opinion.
q01L3 {1,3} : Whether or not the person with whom I speak is sensible to what I may feel.
And so on.
Message was edited by: einsteinbqat

Answer 1

I'm sure that question is an FAQ in whatever language you're asking about. But you should really find the forum for that language. This is the forum for Java programming and that ain't Java.