jQuery File Upload 图片上传解决方案兼容IE6+
1.下载：https://github.com/blueimp/jQuery-File-Upload
2.命令：
npm install
bower install
======================
3.修改basic.html 如下：
1.cdn 静态引用修改
2.ajax提交路径修改
====&&& 其他demo页面修改同理 =======；
下面修改完了以后。如下所示：
<!DOCTYPE HTML>
<!--
/*
* jQuery File Upload Plugin Basic Demo
* https://github.com/blueimp/jQuery-File-Upload
*
* Copyright 2013, Sebastian Tschan
*
* Licensed under the MIT license:
* https://opensource.org/licenses/MIT
*/
-->
<html >
<head>
<!-- Force latest IE rendering engine or ChromeFrame if installed -->
<!--[if IE]><meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"><![endif]-->
<meta charset="utf-8">
<title>jQuery File Upload Demo - Basic version</title>
<meta name="description" content="File Upload widget with multiple file selection, drag&drop support and progress bar for jQuery. Supports cross-domain, chunked and resumable file uploads. Works with any server-side platform (PHP, Python, Ruby on Rails, Java, Node.js, Go etc.) that supports standard HTML form file uploads.">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<!-- Bootstrap styles -->
<link rel="stylesheet" href="http://cdn.bootcss.com/bootstrap/3.2.0/css/bootstrap.css">
<!-- Generic page styles -->
<link rel="stylesheet" href="css/style.css">
<!-- CSS to style the file input field as button and adjust the Bootstrap progress bars -->
<link rel="stylesheet" href="css/jquery.fileupload.css">
</head>
<body>
<div class="navbar navbar-default navbar-fixed-top">
<div class="container">
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-fixed-top .navbar-collapse">
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="https://github.com/blueimp/jQuery-File-Upload">jQuery File Upload</a>
</div>
<div class="navbar-collapse collapse">
<ul class="nav navbar-nav">
<li><a href="https://github.com/blueimp/jQuery-File-Upload/tags">Download</a></li>
<li><a href="https://github.com/blueimp/jQuery-File-Upload">Source Code</a></li>
<li><a href="https://github.com/blueimp/jQuery-File-Upload/wiki">Documentation</a></li>
<li><a href="https://blueimp.net">© Sebastian Tschan</a></li>
</ul>
</div>
</div>
</div>
<div class="container">
<h1>jQuery File Upload Demo</h1>
<h2 class="lead">Basic version</h2>
<ul class="nav nav-tabs">
<li class="active"><a href="basic.html">Basic</a></li>
<li><a href="basic-plus.html">Basic Plus</a></li>
<li><a href="index.html">Basic Plus UI</a></li>
<li><a href="angularjs.html">AngularJS</a></li>
<li><a href="jquery-ui.html">jQuery UI</a></li>
</ul>
<br>
<blockquote>
<p>File Upload widget with multiple file selection, drag&drop support and progress bar for jQuery.<br>
Supports cross-domain, chunked and resumable file uploads.<br>
Works with any server-side platform (PHP, Python, Ruby on Rails, Java, Node.js, Go etc.) that supports standard HTML form file uploads.</p>
</blockquote>
<br>
<!-- The fileinput-button span is used to style the file input field as button -->
<span class="btn btn-success fileinput-button">
<i class="glyphicon glyphicon-plus"></i>
<span>Select files...</span>
<!-- The file input field used as target for the file upload widget -->
<input >https://blueimp.github.io/jQuery-File-Upload/jquery-ui.html （官网提供静态展示）