[Orgmode] adding a style to individual images

[ishi soichi]

Hi.  I would like to specify the widths and heights of images inserted in org-file, which will be exported as html.

There are several images in the original org-file, and each of those needs to be shown differently.  

So I tried putting

#+ATTR_HTML: alt="..." width="100px"

[[imageURL]]

But it does not do anything.

Changing 

Could anyone help me out?

soichi