Which version of JDK/JRE are you used to run Eclipse?

I'm planning to add script support in modify element/run macro. For example: To modify

<input type="text" name="foobar">

to

<html:text property="FOOBAR" id="Foobar">

The attribute value FOOBAR/Foobar must be converted... For other requirement like this, the best solution is allow user create script and did the conversion. However, the solution required JDK/JRE 5.0 support. Please vote or tell me your opinion. Thanks!