How can I know the size of an image in a div (image bigger than the div) ?

How can I know the size of an image in a div (image bigger than the div) ?

Hi everyone,

I'm having a little trouble with something a bit ridiculous. I have an image in a div, let says that the image's width is 100px (but in fact 300px, resize with em) and the div's width is 75px (it's an absolute div created by a plugin). I tried to do $('img').width() naturally, but it gave me the div's width. I tried some natives javascript methods (clientWidth, offsetWidth and scrollWidth), same things (but Firebug is saying that clientWidth is 100px, not 75px :'( ).

I'm lost :( Any ideas ?