JSP form problem

[ruds]

hi,
I have a JSp form, when a user selects an option from a pull down
menu, I want to update the next select options based on the previously
selected option.
For E.G:
My first select options are: Color/Fruits
If user selects Color, then the next dropdown options would be:
RED,YELLOW,GREEN,BLUE
If user selects Fruits then the drop down should have:
APPLE,ORANGE,BANANA...

How should I do this?
I konw i need to use JavaScript but how?

 

[Arne Vajhøj]

I have a JSp form, when a user selects an option from a pull down
menu, I want to update the next select options based on the previously
selected option.
For E.G:
My first select options are: Color/Fruits
If user selects Color, then the next dropdown options would be:
RED,YELLOW,GREEN,BLUE
If user selects Fruits then the drop down should have:
APPLE,ORANGE,BANANA...

How should I do this?
I konw i need to use JavaScript but how?

You need either to submit the form after the
first selection or use AJAX to update the second
after the first selection.

If you use JSF there are plenty of AJAX taglibs.

For pure JSP there are a few.

http://ajaxtags.sourceforge.net/

can do what you want and is reasonable simple.

Arne

 

[Arne Vajhøj]

Ask this question again in comp.lang.javascript then

If he want to go into the world of having to maintain
lots of poorly unstructured JavaScript code.

Using a taglib that outputs the JavaScript makes maintenance
a lot easier.

Arne