From your link: "
responseXML was introduced in Windows Internet Explorer 7" - in October 2006. XHR was first shipped with Internet Explorer 5 - in March 1999!
JavaScript's syntax is less like Java's than any other popular language that idiomatically uses curly-braces to delimit blocks.
Hamster starts with Ham, but they are as unrelated as two things can be that exist in the same broad category (flesh).