You can open an external spreadsheet by clicking a link in an Excel spreadsheet. For instance, you might add an "Open Sales spreadsheet" link to the spreadsheet you are editing.

How to Link to a Selected Drop-Down Item to Open a Web Page. HTML form items like drop-down menus enable you to add dynamic functionality to your Web pages using JavaScript.

Of all the hats JavaScript can wear, its form-processing features are among the most sought and used. Learn how to use JavaScript for form processing, validation, and more.

You can make a Google Form public, or open to respondents or collaborators, by adjusting its sharing settings. Here's how to do it.