上传图片并浏览

<input type="file" id="fileElem" multiple accept="image/*" onchange="handleFiles(this)">
<div id="fileList" style="width:200px;height:200px;"></div>

<script>
window.URL = window.URL || window.webkitURL;
var fileElem = document.getElementById("fileElem"),
fileList = document.getElementById("fileList");
function handleFiles(obj) {
var files = obj.files,
img = new Image();
if(window.URL){
//File API
alert(files[0].name + "," + files[0].size + " bytes");
img.src = window.URL.createObjectURL(files[0]); //创建一个object URL，并不是你的本地路径
img.width = 200;
img.onload = function(e) {
window.URL.revokeObjectURL(this.src); //图片加载后，释放object URL
}
fileList.appendChild(img);
}else if(window.FileReader){
//opera不支持createObjectURL/revokeObjectURL方法。我们用FileReader对象来处理
var reader = new FileReader();
reader.readAsDataURL(files[0]);
reader.onload = function(e){
alert(files[0].name + "," +e.total + " bytes");
img.src = this.result;
img.width = 200;
fileList.appendChild(img);
}
}else{
//ie
obj.select();
obj.blur();
var nfile = document.selection.createRange().text;
document.selection.empty();
img.src = nfile;
img.width = 200;
img.onload=function(){
alert(nfile+","+img.fileSize + " bytes");
}
fileList.appendChild(img);
}
}
</script>