I just edited one of my pages. After i uploaded it it just keeps popping up a messagebox saying "Error: Invalid Character" in line: 1. What does this mean?

It means your Javascript isn't 'well-formed' and will give a Javascript error if it comes across a character it isn't expecting or in the wrong place. Some common invalid characters include:

\ / .. < > # % & " '

You'll have to post a link to the page or copy the code in question into a new post for someone to have a look at.

Tel.