JavaScript DHTML/Javascript Collections/options
"options" Example
<source lang="html4strict">
<html> <body> <select id="mySelect">
<option>List Item 1</option> <option>List Item 2</option> <option>List Item 3</option> <option>List Item 4</option> <option>List Item 5</option> <option>List Item 6</option>
</select> <button onclick="alert(mySelect.options.length);"> Number of options in the select list </button> </body> </html>
</source>