<!DOCTYPE HTML>
<html>
<head>
<style>
#box{
width:150px;height:150px;border:1px dashed red;
font-size:13px;line-height:150px;text-align:center;
}
</style>
<script>
window.onload=function () {
var box=document.getElementById("box");
box.ondragenter=function (e) {
e.preventDefault()
}
box.ondragover=function (e) {
box.innerHTML="请松开"
e.preventDefault()
}
box.ondragleave=function (e) {
box.innerHTML="请拖入上传的文件"
e.preventDefault()
}
box.ondrop=function (e) {
var file=e.dataTransfer.files[0];
var formData=new FormData();
formData.append("aa",file);
var xml=new XMLHttpRequest();
xml.open("post","up.php");
xml.send(formData);
e.preventDefault()
}
}
</script>
</head>
<body>
<div id="box">
请拖入上传的文件
</div>
</body>
</html>
原文地址：http://blog.csdn.net/sjtu_chenchen/article/details/45649391
