1064 error on If statement in script

[Carl Reiff]

I have a VERY simple script. I've dumbed it way down:

Set @DisplayVal = 1;

If @DisplayVal = 1 Then
Select "Success";
End If;

When I execute it in the query analyzer I get: #1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'If @DisplayVal = 1 Then
Select "Success"' at line 1

This is with MySQL 5.5.32. For the life of me, I can't figure what could be wrong with this. I'm a SQL Server guy, but I'm writing an app for a customer who's ISP only offers MySQL. Does MySQL not allow If statements in scripts? From what I've read in the docs, it seems that it's supported in both scripts and stored procedures, but some comments I've seen on the web have indicated that it's only supported in SPs.