Is x a reserved keyword in Javascript FF/Safari not in IE?

Question

A web page of a web application was showing a strange error. I regressively removed all the HTML/CSS/JS code and arrived to the basic and simple code below.

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Answer 1

I can't seem to find any documentation to support this, but my guess is that the tag is being treated specially, and the object is actually a JavaScript Image object, not a normal DOM element. The Image object has an x property, and so your unscoped reference to x means Image.x. If you want the global x property, just use window.x instead.