If your web pages have a huge list of options to show in the drop down menus (listed into categories), why don't you consider to use this JavaScript dropdown code example? This JavaScript dropdown menu generates multiple choices of drop down list in your web forms. Users click a link of category to change the content of drop down list dynamically. Add as many JavaScript dropdown value and categories as you want. Full detailed documentation of script explained in the script comments.

Let use this multiple select script if you want to create select boxes that relate to anothers, by onchange event. Choose a value in the first select options and the script will precess and display the available select values in the second box to match your selection automatically. Easy to use, with full comments in source code.

You can also see more for multiple select, dynamic dropdown,...

This is one of JavaScripts that make chaining dropdown lists; in this JavaScript example is Country, State, City, select a country in first HTML dropdown for selecting states in the second dropdown, for cities in last dropdown.

You can customize this JavaScript code as you need, such as automobiles: type/make/model or books: publisher/author/title.

This script reveals information, based on the user's selection in a drop down box. Can be used for a FAQ, contact info, and more. Short and sweet, with comments.

Add or change options on a form select menu. This JavaScript will also allow sub-group items, for additional selections.

Add or remove objects in a select list, using the DOM. This JavaScript was written to work with DOM Level 1 and DOM Level 2 capable browsers, with try/catch logic included for IE use.

Using a drop-down menu, this script will provide different values, depending on the user's selection. Easily added to any form.

Add a simple JavaScript menu to your site with this dropdown form. Easy to use and customize.

Customize Dropdown Menu is designed to display some choices, as: languages, countries, themes,... but it's differrent from original version in browsers. This tool combine CSS and JavaScript to create a dropdown you can add image to tilte, every choice.

Version 2: check if JavaScript is disabled, then add normal dropdown menu

Let's try dropdown below and feel differences.
Tested: IE 7, Opera 9, Firefox 2, Netscape 8.

Use this JavaScript to easily change the order of options in a select box. You can see the order change as it happens in the "New Order" box. (The input can be hidden and used to change the order on the server side.)