Display image at 50% of its “native” size

Question

I\'m putting an img tag in a document without knowing the width/height of the corresponding image:

Answer 1

The zoom property sounds as though it's perfect for Adam Ernst as it suits his target device. However, for those who need a solution to this and have to support as many devices as possible you can do the following:

The reason for the this.onload=null addition is to avoid older browsers that sometimes trigger the load event twice (which means you can end up with quater-sized images). If you aren't worried about that though you could write:

Which is quite succinct.