Mega Code Archive
Select options length
<![CDATA[
The length property returns the number of options in that instance of a select box.
<html>
<form name="myForm">
<select name="mySelect" onChange='alert(mySelect.options.length)'>
<option value=A>AA</option>
<option value=B>BB</option>
<option value=C>CC</option>
<option value=D>DD</option>
</select>
</form>
</html>
]]>