//事件委托
oUl.|| window.event;
var target = event.target || event.srcElement;
if(target.nodeName.toLowerCase() === ‘li‘){
target.style.background = ‘red‘;
}
};本文出自 “Rcid” 博客，请务必保留此出处http://13419255.blog.51cto.com/13409255/1976146
原文：http://13419255.blog.51cto.com/13409255/1976146