update readme

Author: SunLn

README.md

@@ -55,7 +55,7 @@ qiniu-js-sdk
 * 初始化上传
 
     ```javascript
-
+    var Qiniu = new QiniuJsSDK();
     var uploader = Qiniu.uploader({
         runtimes: 'html5,flash,html4',    //上传模式,依次退化
         browse_button: 'pickfiles',       //上传选择的点选按钮，**必需**
@@ -132,6 +132,25 @@ qiniu-js-sdk
     // domain 为七牛空间（bucket)对应的域名，选择某个空间后，可通过"空间设置->基本设置->域名设置"查看获取
 
     // uploader 为一个plupload对象，继承了所有plupload的方法，参考http://plupload.com/docs
+
+    ```
+
+    如果一个页面中有多个上传实例，可以如下操作
+    ```javascript
+    var Qiniu = new QiniuJsSDK();
+    var op1 = {
+        key : val ,
+        ……
+    };
+    var uploader = Qiniu.uploader(op1);
+
+    var Qiniu2 = new QiniuJsSDK();
+    var op1 = {
+        key : val ,
+        ……
+    };
+    var uploader2 = Qiniu2.uploader(op2);
+
     ```
 
 * 运行网站，通过点击`pickfiles`元素，选择文件后上传

demo/js/multiple.js

@@ -17,17 +17,6 @@ $(function() {
         chunk_size: '4mb',
         uptoken_url: $('#uptoken_url').val(),
         domain: $('#domain').val(),
-        // downtoken_url: '/downtoken',
-        // unique_names: true,
-        // save_key: true,
-        // x_vars: {
-        //     'id': '1234',
-        //     'time': function(up, file) {
-        //         var time = (new Date()).getTime();
-        //         // do something with 'time'
-        //         return time;
-        //     },
-        // },
         auto_start: true,
         init: {
             'FilesAdded': function(up, files) {
@@ -59,17 +48,11 @@ $(function() {
                 progress.setComplete(up, info);
             },
             'Error': function(up, err, errTip) {
-                    $('table').show();
-                    var progress = new FileProgress(err.file, 'fsUploadProgress');
-                    progress.setError();
-                    progress.setStatus(errTip);
-                }
-                // ,
-                // 'Key': function(up, file) {
-                //     var key = "";
-                //     // do something with key
-                //     return key
-                // }
+                $('table').show();
+                var progress = new FileProgress(err.file, 'fsUploadProgress');
+                progress.setError();
+                progress.setStatus(errTip);
+            }
         }
     });
 
@@ -89,17 +72,6 @@ $(function() {
         chunk_size: '4mb',
         uptoken_url: $('#uptoken_url').val(),
         domain: $('#domain').val(),
-        // downtoken_url: '/downtoken',
-        // unique_names: true,
-        // save_key: true,
-        // x_vars: {
-        //     'id': '1234',
-        //     'time': function(up, file) {
-        //         var time = (new Date()).getTime();
-        //         // do something with 'time'
-        //         return time;
-        //     },
-        // },
         auto_start: true,
         init: {
             'FilesAdded': function(up, files) {
@@ -131,22 +103,16 @@ $(function() {
                 progress.setComplete(up, info);
             },
             'Error': function(up, err, errTip) {
-                    $('table').show();
-                    var progress = new FileProgress(err.file, 'fsUploadProgress');
-                    progress.setError();
-                    progress.setStatus(errTip);
-                }
-                // ,
-                // 'Key': function(up, file) {
-                //     var key = "";
-                //     // do something with key
-                //     return key
-                // }
+                $('table').show();
+                var progress = new FileProgress(err.file, 'fsUploadProgress');
+                progress.setError();
+                progress.setStatus(errTip);
+            }
         }
     });
 
     uploader2.bind('FileUploaded', function() {
-        console.log('hello man,a file is uploaded');
+        console.log('hello man 2,a file is uploaded');
     });
 
     $('#container').on(

demo/views/index.html

@@ -86,7 +86,7 @@ <h4 class="modal-title" id="myModalLabel">查看初始化代码</h4>
           <div class="modal-body">
             <pre><code>
             //引入Plupload 、qiniu.js后
-
+            var Qiniu =  new QiniuJsSDK();
             var uploader = Qiniu.uploader({
                 runtimes: 'html5,flash,html4',    //上传模式,依次退化
                 browse_button: 'pickfiles',       //上传选择的点选按钮，**必需**

demo/views/multiple.html

@@ -92,7 +92,7 @@ <h4 class="modal-title" id="myModalLabel">查看初始化代码</h4>
           <div class="modal-body">
             <pre><code>
             //引入Plupload 、qiniu.js后
-
+            var Qiniu =  new QiniuJsSDK();
             var uploader = Qiniu.uploader({
                 runtimes: 'html5,flash,html4',    //上传模式,依次退化
                 browse_button: 'pickfiles',       //上传选择的点选按钮，**必需**