ADD and REMOVE Buttons

[aamuktha]

hi Friends,

Below is my reuirement,

i have a three prompts on my prompt page.

Between First prompt and second prompt there is a cascade functionality.
First prompt has static choices. like books,pens,pencils etc. it has single selection option.
when the user selects a single value from the first prompt the respective values populates in the second prompt. Under the second prompt i have an ADD button. Second prompt has Multi selection option.
if user selects multiple values from second prompt and click on ADD button which appears under the second prompt the seelction values from second prompt and as well as from frist prompt should add to the third prompt.  On adding the values to the third prompt the below Note should be considered.
Note :
1. the system will un-select the value chosen in the first prompt.
2. the system will clear all selected values from the second prompt as well .

In similar way there is REMOVE button under third prompt. it also has Multi select option. if user selects multi values in third prompt and clicks on REMOVE button the selcted values get deleted from third prompt. and if user selects a value which is related to first prompt from the third prompt and click on REMOVE button the associated values will alo be deleted from thrid prompt.


It is tricky logic. Please mail me about your queries on this logic.
It is possible only through JAVA Script.

Thanks in advance