<img src="http://s1.hao123img.com/res/images/search_logo/web.png" />
<img src="错误地址" onerror="javascript:this.src=‘http://s1.hao123img.com/res/images/search_logo/web.png‘;" />
img onerror 图片地址错误替换
原文：http://www.cnblogs.com/yutaoyao/p/4126795.html
