I think this is be asked hundreds of times before but I can't find it 
I want to make some online/offline buttons for racers on our forum, I know how this works, I know spaces must be filled with %20, but I have a problem with one name, he has "[ ]"characters in his name and his button doesn't work.
1st question: How do I handlle with these characters ?
Johan........
Henk.........
Jack...........
Ronald.......
Sjoerd........
<== this one doesn't work
Raymond....
2nd qustion: I want the same kind of button for our server
server.........
This doesn't work to make a server visible but I don't know any other solution..

I want to make some online/offline buttons for racers on our forum, I know how this works, I know spaces must be filled with %20, but I have a problem with one name, he has "[ ]"characters in his name and his button doesn't work.
1st question: How do I handlle with these characters ?
Johan........

Henk.........

Jack...........

Ronald.......

Sjoerd........

Raymond....

2nd qustion: I want the same kind of button for our server
server.........

This doesn't work to make a server visible but I don't know any other solution..