extended dropdownbox

[tne7laa]

I'm searching for code to do the following:
Example:Show a dropdownbox with countries. I'm searching for Japan.
When i press the letter J in the box it will select Jamaica, then i press A, it will still select JAmaica, then i press P and it will select JAPan.

[Khalid Ali]

It seems like you are looking for something like this

http://www.webapplikations.com/pages/html_js/forms/SearchValueInListBox.html

[tne7laa]

Thanks for thinking, but...

That is not it.
I'm searching for a listbox with countries. When i type the characters it as to scrol automaticially to that country. A normal listbox responses only to the first character of the listbox.
I am searching for a list box when i'm typing it refines my selection. Typing JAP it gives me Japan and not the country beginning with the letter P.
Sorry for my bad enlish.