Get the real width and height of an image with JavaScript? (in Safari/Chrome)

Question

I am creating a jQuery plugin.

How do I get the real image width and height with Javascript in Safari?

The following works with Firefox 3, IE7 and Opera 9:

Answer 1

Another suggestion is to use imagesLoaded plugin.

$("img").imagesLoaded(function(){
alert( $(this).width() );
alert( $(this).height() );
});