Drop down list 2 with changing values acc. to drop down list 1

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Drop down list 2 with changing values acc. to drop down list 1

Optimistic

I don't know whether it is possible but in an ideal world I would like to do the following:

Select a departure point A, B, C, D from a drop down list 1 (so far, so good, I can do that!)

If departure point is A or B only show arrival points 5, 6, 7 and 8 in drop down box 2.

If departure point is C or D only show arrival points 1, 2, 3, 4 in drop down box 2.

Somehow these values should be in my html form but I presume there should be some javascript function called, once the first selection is made in drop down box 1??

I would appreciate any help or advice.

Thanking you in advance.

tos

Basically you have javascript run a function, onchange (the select box) it checks a javascript array and replaces the values of that box with the array values.. Since I'm sure you aren't too well versed just search on google "javascript dynamic select box" or if you use jquery/ajax.. Try looking at this

http://remysharp.com/2007/01/20/auto-populating-select-boxes-using-jquery-ajax/

You can also do it without jquery/ajax.. but yeah lots of places do it, and it's not too difficult.

Optimistic

Thank you Tos, that gives me some good indication of where to start. It looks fairly straightforward (famous last words!)