On selection, change contents of combo box

[lost]

I have 2 combo boxes, one for category and one for type.
On start the category combo box includes a list of all categories, i.e. books, video, music, dvd. the type combo box includes nothing.
Once a category form the combo box has been selected, the type combo box gets populated with the specific types for that category.

Anyone know how to do this???

[Weirfire]

When you say combo box do you mean the select option form list?

If so then yes I know how to do this.

[TheHoff]

Better to do it in Javascript and avoid the page refreshes. Use PHP to build the Javascript lists.

http://www.felgall.com/jstip22.htm <-- a good tutorial on it

[lost]

yes that is what i mean, can you help me?

[lost]

Thanks vbMechanic...thats exactly what i need :)

[Weirfire]

Thats almost exactly what I had as well.

You could use some css to hide the list that doesnt have anything until the first list has been selected :)

[lost]

what's css??

[Weirfire]

cascading style sheets

http://www.w3schools.com/css/default.asp


It helps you layout the html on your webpages and you can use it to hide unwanted code.

[mnemtsas]

I do this in several spots. You need to build up a js array for each selection list. Then on the onclick event of the first box you fill the contents of the second box with appropriate js array. When I get to work I'll post the js I construct from php and the code I use to construct it.

[sarahk]

If you need to query the database to get the results for the first list a technique like I use here (http://sarahk.pcpropertymanager.com/muck/example.php) may be useful but these days people use AJAX (http://en.wikipedia.org/wiki/AJAX).