Why is jQuery auto lower casing attribute values?

Question

I am working with an SVG that is directly placed into an HTML file

Using javascript/jQuery I want t

Answer 1

I might depend on your encoding document type. XHTML documents must use lower case for all HTML element and attribute names. I'm not sure about HTML.

Update 2

The only solution I could find is to use:

$("svg")[0].setAttribute("viewBox", "0 0 166 361");

Update

I can't explain it for any reason, I tested on my own host because JsFiddle always uses XHTML (boo!). In all cases it was lowercase, but it was still an SVG Element in FF, Chrome and IE9 (I don't know if they were valid because I don't know SVG I'm afraid).