“…sibling element. That is, an element that shares the same parent.” Unfortunately, that is not true. It only matches following siblings. See my JSFiddle demo

“…sibling element. That is, an element that shares the same parent.” Unfortunately, that is not true. It only matches following siblings. See my JSFiddle demo: http://jsfiddle.net/alanhogan/sSVCG/ http://jsfiddle.net/alanhogan/sSVCG/ (Also, HTML comments between elements apparently mess up IE7 and IE8.)