Basically, it may be wise to test the element whose onclick handler would like to open a popup and restrict the popup if the area is too large. Points to think about: * Should it be a percentage of the page size? * Perhaps a fixed size makes more sense? * Should the onclick element that is making the open call be checked or the element the event originated from? (event bubbling) I think this may be a good idea to mitigate a lot of popups that wait until you click any part of the page and then use that click to generate a popup ad. Open suggestion, what does everyone think?

Add to the list: * Perhaps also check DOM hierarchy position of onclick element.

I don't think this would work as a way to prevent onclick popup ads. A malicious page could always make lots of small elements, or a small one that follows the mouse.

(In reply to comment #2) > I don't think this would work as a way to prevent onclick popup ads. A > malicious page could always make lots of small elements, or a small one that > follows the mouse. Then add to the list invisible (and by that I don't just mean 'display:none' elements, rather elements that don't show on the page, e.g., same colors as the background element) elements. The idea is, if there was a visible smaller-sized element that was clicked on we can be much more confident that the click was intentional. Otherwise it's a trap...