How to build the java project target as 1.5 by 1.6 JDK with Intellij IDEA?

I am working on a project which must be deploy in the 1.5 runtime environment. So does anyone know how to build the project target as 1.5 by 1.6 JDK with Intellij IDEA, and My development is Mac OSX 10.8 and JDK 1.6

How do I change the target bytecode version in IntelliJ?

I went into Settings>Build, Execution, Deployment>Compiler>Java and saw that the target bytecode version for one of my modules was set to 1.5, so I changed it to 1.8, compiled, and it worked.

How do I point to JDK in IntelliJ?

From the main menu, select File | Project Structure | Project Settings | Project. If the necessary JDK is already defined in IntelliJ IDEA, select it from the SDK list.

Bytecode version can be controlled per project or per module:

bytecode version