form with structure of depending dropdown fields

Hello, Bob! I`m not programmer, and try to make the search form for my real-estate site.
I seek for understanding, what simple steps will follow me to the result. I have installed J!2.5.4., some tables in mySQL DB whith properties parameters and real estate objects, and installed the Chronoforms 4. The form I wish, must have some dropdown fields, e.g.:
dropdown 1. City (options: Praha, NewYork, Moscow). If Praha than shows dropdown 2., If New York than shows dropdown 3., if Moscow, than shows dropdown 4.,
dropdown 2. District (options: Nove Mesto, Praha-2, Karlin, etc )
dropdown 3. District (options: list of districts of New York)
dropdown 4. District (options: list of districts of Moscow)
and so on step by step.
Ones the form is completly filled by user, he click "submit", and can see table of selected from DB rows whith real estate objects he want.
Please, explain to me, how to create it. I`v seen something like that here:
http://demo.rsjoomla.com/dynamic-drop-down-change-form-example
, but afraid it have no simple tools to work whith DB...
Hope of help, thank you for you work.

Hi Steelrope,

Please see this FAQ

Bob

Thanks for your quick response, Bob, It seems to me, I have got it! So, could I ask one more question, please. When Form Wizard mode =advanced (default), the form does not shows anymore, but if I switch to "Easy" - it`s works again.
Thank you very much.

Hi SteelRope,

Hmm . . . it should work in Advanced if it works in Easy. Is there a Show HTML action in the On Lod event?

Please take a Form Backup using the icon in the Forms Manager and post it here (as a zipped file) or PM or email it to me and I'll take a closer look.

Bob

Thanks, Bob! Here it is.

Hi SteelRope,

Please drag a Show HTML action into the On Load event of your form. Please see the video 'A First Form' at http://youtube.com/greyheadnet[flash=][/flash]

Bob