From my experience, middle mouse clicks do not trigger the handler. Here's a fiddle to test: http://jsfiddle.net/GTWfn/ http://jsfiddle.net/GTWfn/. Try middle-c

From my experience, middle mouse clicks do not trigger the handler. Here's a fiddle to test: http://jsfiddle.net/GTWfn/ http://jsfiddle.net/GTWfn/. Try middle-clicking that link vs. left clicking.