1 - Is there a way to make an absolute-positioned image click-through-able? (so you can click links behind it)

2 - Is there way to stop a huge absolute-positioned image that goes right off the page from making the page super wide, creating lots of empty scrolling space? (example: you have a 4000px wide absolute-positioned image, and it makes the page scroll off into the horizon forever. I want it to run off the page, but not change the size of it by adding scroll-space)

These images are essentially pure white, transparent images used to "gray out" large sections of a page.