<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>上传一下看看</title> </head> <body> <form action="__SELF__" method="post" onsubmit="return checkfilefun()"> <input type="file" id="pic" name="pic[]" multiple="multiple"> <input type="submit" value=" 提交查看信息 "> </form> <img src="" alt="" id="previewImage"> <script> function checkfilefun() { var files = document.querySelector(‘#pic‘).files; for (var i = 0, f; f = files[i]; i++) { if (!f.type.match(‘image.*‘)) { continue; } var reader = new FileReader(); reader.onload = (function (theFile) { return function (e) { document.getElementById(‘previewImage‘).src = e.target.result; }; })(f); reader.readAsDataURL(f); } return false; } </script> </body> </html>
原文：http://www.cnblogs.com/ahwu/p/5385997.html