> ### Choosing between JavaScript and Java

> Both JavaScript and Java have advantages and disadvantages when writing an event handler. For a developer who is familiar with only one of the two languages, the advantage of using the familiar language is obvious, but for others the decision depends on the report requirements.

> The advantages of using JavaScript to write an event handler include

> n | Ease of adding a simple script for a particular event handler

> Adding a JavaScript event handler to a report is less complicated than adding a Java event handler. When writing a JavaScript event handler, there is no need to create a Java environment in Eclipse or to learn the Eclipse Java development process. You are not required to specify a package, implement an interface, or know the parameters of the event handler you write.
> To add a JavaScript event handler, you type the code for the event handler on the Script tab after selecting the name of the event handler from a drop-down list.

> n | Simpler language constructs, looser typing, and less strict language rules

> JavaScript is less demanding to code than Java due to these more relaxed requirements.

> The advantages of using Java to write an event handler include

> n | Availability of the Eclipse Java development environment

> The Eclipse Java development environment is very powerful and includes such features as autocompletion, context sensitive help, keyboard shortcuts, parameter hints, and more.

> n | Ease of finding and viewing event handlers

> All the Java event handlers for a report exist in readily viewable Java files. By contrast, the JavaScript event handlers are embedded in the design and you can view only one handler at a time.

> n | Access to an integrated debugger

> The integrated debugger only supports Java event handlers, not JavaScript event handlers.

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