$(document).on(‘mouseover mouseout‘,‘ul li‘,function(){
if (event.type == ‘mouseover‘) {
console.log($(this));
}else if(event.type == ‘mouseout‘){
console.log($(this));
}
});
上述代码在IE8下会console多个结果，在代码末端添加return false可解决问题；
ie8下$(document).on('mouseover mouseout','ul li',function(){})的bug
原文：http://www.cnblogs.com/huangzebin/p/6144186.html