1.这个是对于单个图片，如果没有图片就替换。
<img src="" border="0" onload="javascript:DrawImage(this);" onerror="changeImg()" />
<script language="javascript" type="text/javascript">
function changeImg()
{
var newErrorImgUrl = "/images/error.gif";
event.srcElement.src = newErrorImgUrl;
event.srcElement.alt = "";
}
</script>
方法二
<img src="pro-pic/123.gif" onerror="javascript:this.src=’pro-pic/default.gif’" />
2.下面那个 是对于整个页面当图标访问错误的时候 替换默认的
<body>
<img src="1.jpg" />
<img src="2.jpg" />
<img src="3.jpg" />
<img src="4.jpg" />
</body>
</html>
<script type="text/javascript">
var imgs = document.images;
for(var i = 0;i < imgs.length;i++){
imgs[i].onerror = function(){
this.src = "/images/logo.gif";
}
}
</script>