# Prerequisites

In order to use JSEclipse you must have the following software installed:

- The Eclipse SDK version 3.1 or higher - the main page of the Eclipse project is here.

- The Java Runtime Environment version 1.5 or higher - you can get it here.

If you already meet the prerequisites you can move on and install the JSEclipse plugin.

Note: JSEclipse versions previous to 1.5 only work on Eclipse 3.1 and the Java Runtime Environment 1.5.