How to create a drop-down list in Excel to manage data and prevent mistakes

You can easily create a drop-down list in Excel to limit the values that can be entered in a column. Here's how to set one up ...
Ars Technica

Hiding Drop Down menus in javascript

Hey all,<BR><BR>I'm new to coding with javascript and I need a little help.<BR><BR>I have a page that I need to display a set of drop down boxes and make visible another drop down box based on the ...