IE Error - Expected identifier, string or number

I spent two days for this error. Everything works just fine in Firefox. It doesn't in IE. When I had found the cause of the problem I remembered how often my mom told me to be attentive. Compare the Javascript code: var root = { name: "hello world", } with this one: var root = { name: "hello world" } See the error? Can you imagine such a mistake in a large file? I like JavaScript a lot, but I hate how much it is (and me) error prone. I hope I have learned the lesson.