How to add items in the dropdown list dynamically on radio button selection

I have a query related to Java Script as i am very new to JavaScript.
My Problem is...
i have created a group of radio button,1.new car 2.old car
onclick event i want to fetch some data from database and display in the dropdown list box corresponding to new car and old car...as i have tested that data is fetched from database correctly but cudn't display in the drop down list box on the click event of radio buttons.
[ May 27, 2008: Message edited by: Soni Agrawal ]

You either need to postback the page by submitting a form or you have to load the data with Ajax.

Eric

i m not using any submit button for radio buttons,i m getting data from database thru query that is written in a separate java file..so for every radio button selection,i m creating an object of that java class and calling different different functions according to selection..

actually i m new to javaScript,may be there will be any syntex problem that i m facing..please try to solve my problem

And the dropdown listbox will be on the same page itself.

In order to get that query you have to postback the form. It can be done the classic way [requires the page to refresh and uses onclick with document.formName.submit();] or the Ajax way [does not cause the page to refresh] as I stated before.

Eric

on submit() what function i have to call

You can find a good starting tutorial on Ajax in this article.

As you can see, it's more than just any function that you need to call.

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