Every time I try to open a javascript I get an error saying some confusing things that I will post below. What do they mean, and how do I fix the error?

Questions & Answers
1

The error is as follows;
Script: [location of file]
Line: 1
Char: 1
Error: Invalid character
Code: 800A03F6
Source: Microsoft JScript compilation error

2

You are probably using a invalid character somewhere. Check your code you misstyped something, or forgot to close a statement or forgot a simbol.

3

This sounds like you’re opening the file from Windows explorer rather than Unity.

If you double click on a .js file in Windows it will try to run it using Windows Script Host. If it’s a Unityscript file, it won’t be able to run it (because Unity javascript is not even vaguely javascript) and you will get messages like the one listed above.

To open the file double click it in the Unity editor. This will open the entire project in MonoDevelop, which is where you want to start.