what are the “for” and “event” attributes of the script tag (Javascript,HTML)

Question

In a web application I\'ve inherited at work which was written about 10 years ago I\'ve noticed the following code snippets repeatedly used:

Answer 1

According to MSDN, the:

for attribute:

Sets or retrieves the object that is bound to the event script.

event attribute:

Sets or retrieves the event for which the script is written.

Therefore, I presume as you have that you can drop the non-standard attributes and use the lines you added to get the element, and handle the mousedown event.