Tested several times in FF12, IE8, and Chrome(no idea of version number).
In IE8 and Chrome, every image that is wider than 300 pixels initially loads in its original size, and then is quickly resized to 300 pixels wide, keeping the ratio for height.
In FF, it happens so fast that it appears as if images larger than 300 pixels wide load at 300 pixels wide.
So far, $(window).load() is working as expected.
If anyone knows of a website that can offer ColdFusion help that isn't controlled by neurotic, pedantic jerks* (stackoverflow.com), please PM me with a link.
* The neurotic, pedantic jerks are not the owners; just the people who are in control of the "popularity contest".