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<title>JavaScript判断远程图片是否存在，不存在则替换指定图片</title>
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<p>判断百度的LOGO是否存在：<br>
<IMG src="http://www.baidu.com/img/baidu_logo.gif" onerror="javascript:this.src='/images/logo.jpg'"></p>
<p>如果不存在，则替换成本地网站logo：<br><IMG src="http://www.baidu.com/img/baidu_logo11.gif" onerror="javascript:this.src='/images/logo.gif'"></p>
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