The thing is: browser zoom is not anything like a standard feature, even though I became a commonplace in all well-known browsers, so, how can it be accessible via a standard language like JavaScript? (The standard is EMCAScript,
http://en.wikipedia.org/wiki/ECMAScript[
^]). You can zoom the content itself, but this is not the same as browser zoom, which works in different ways in different browsers.
See also:
http://stackoverflow.com/questions/1055336/changing-the-browser-zoom-level[
^].
I would prefer to rely on the browser zoom feature and the user use of it. You business it rather the Web application design tolerant to zooming and looking nice at different reasonable zoom levels.
—SA