解决Firefox浏览器本地图片预览显示问题

<img id="img1" src=""/>
<script>
function fileChange(obj) {
var url = obj.value url = "file:///" + url.replace("\\",'/');
alert(url);
document.getElementById("img1").src= url;
} 
</script>
<input type="file" onchange="fileChange(this);" />

关键在于执行语句：url = "file:///" + url.replace("\\",'/')