HELP: Strict JavaScript Syntax Checker Verifier

[dhruba bandopadhyay]

Two quick questions: 1. I really love Mozilla Firefox's javascript.options.strict mode (type about:config in addressbar). However it still doesn't pick up on certain things such as making it compulsory to have semi-colon as a statement terminator. I have hundreds of organically grown JavaScript files that are millions lines long. They are not written by me but by former employees and I've been handed the job of debugging & fixing their code. Does anyone know of a good Very strict JavaScript syntax verifier checker? What is the best JavaScript IDE out there? 2. What happens if I keep on writing: var control = new Control(); var control = new Control(); var control = new Control(); 500 times? Will this cause a memory leak? Or will the previous object be deleted since the reference is lost? Or is it handled differently in IE & FF?

[subrata jana]

there wont be any memory leak it is handled by DOM it will consider the last var control = new Control();