AjaxUpLoad.js使用实现文件上传

AjaxUpLoad.js的使用实现无刷新文件上传，如图。

图1 文件上传前

图2 文件上传后

1、创建页面并编写HTML

 上传文档:
 <div class="uploadFile">
     <span id="doc"><input type="text" disabled="disabled" /></span>
     <input type="hidden" id="hidFileName"  />
     <input type="button" id="btnUploadFile" value="上传" />
     <input type="button" id="btnDeleteFile" value="删除"  />
 </div>

 上传图片:
 <div class="uploadImg">
     <img id="imgShow" src="/images/nophoto.gif" />
     <input type="hidden" id="hidImgName" />
     <input type="button" id="btnUploadImg" value="上传" />
     <input type="button" id="btnDeleteImg" value="删除" />
 </div>

2、引用AjaxUpload.js文件

 <script src="/js/common/AjaxUpload.js" type="text/javascript"></script>

3、编写JS脚本

 window.onload = function() {
     init();  //初始化
 }

 //初始化
 function init() {
     //初始化文档上传
     var btnFile = document.getElementById("btnUploadFile");
     var doc = document.getElementById("doc");
     var hidFileName = document.getElementById("hidFileName");
     document.getElementById("btnDeleteFile").onclick = function() { DelFile(doc, hidFileName); };
     g_AjxUploadFile(btnFile, doc, hidFileName);

     //初始化图片上传
     var btnImg = document.getElementById("btnUploadImg");
     var img = document.getElementById("imgShow");
     var hidImgName = document.getElementById("hidImgName");
     document.getElementById("btnDeleteImg").onclick = function() { DelImg(img, hidImgName); };
     g_AjxUploadImg(btnImg, img, hidImgName);
 }


 var g_AjxTempDir = "/file/temp/";
 //文档上传
 function g_AjxUploadFile(btn, doc, hidPut, action) {
     var button = btn, interval;
     new AjaxUpload(button, {
     action: ((action == null || action == undefined) ? '/Common/UploadHandler.ashx?fileType=file' : action),
         data: {},
         name: 'myfile',
         onSubmit: function(file, ext) {
             if (!(ext && /^(rar|zip|pdf|pdfx|txt|csv|xls|xlsx|doc|docx|RAR|ZIP|PDF|PDFX|TXT|CSV|XLS|XLSX|DOC|DOCX)$/.test(ext))) {
                 alert("您上传的文档格式不对，请重新选择！");
                 return false;
             }
         },
         onComplete: function(file, response) {
             flagValue = response;
             if (flagValue == "1") {
                 alert("您上传的文档格式不对，请重新选择！");
             }
             else if (flagValue == "2") {
                 alert("您上传的文档大于2M，请重新选择！");
             }
             else if (flagValue == "3") {
                 alert("文档上传失败！");
             }
             else {
                 hidPut.value = response;
                 doc.innerHTML="<a href='" + g_AjxTempDir + response + "' target='_blank'>" + response + "</a>";
             }
         }
     });
 }
 //图片上传
 function g_AjxUploadImg(btn, img, hidPut) {
     var button = btn, interval;
     new AjaxUpload(button, {
         action: '/Common/UploadHandler.ashx?fileType=img',
         data: {},
         name: 'myfile',
         onSubmit: function(file, ext) {
             if (!(ext && /^(jpg|JPG|png|PNG|gif|GIF)$/.test(ext))) {
                 alert("您上传的图片格式不对，请重新选择！");
                 return false;
             }
         },
         onComplete: function(file, response) {
             flagValue = response;
             if (flagValue == "1") {
                 alert("您上传的图片格式不对，请重新选择！");
             }
             else if (flagValue == "2") {
                 alert("您上传的图片大于200K，请重新选择！");
             }
             else if (flagValue == "3") {
                 alert("图片上传失败！");
             }
             else {
                 hidPut.value = response;
                 img.src = g_AjxTempDir + response;
             }
         }
     });
 }

 //删除文档
 function DelFile(doc, hidPut) {
     hidPut.value = "";
     doc.innerHTML = "<input type=\"text\" disabled=\"disabled\" />";
 }

 //删除图片
 function DelImg(img, hidPut) {
     hidPut.value = "";
     img.src = "/images/nophoto.gif";
 }

4、创建/Common/UploadHandler.ashx处理程序

 <%@ WebHandler Language="C#" Class="UploadHandler" %>

 using System;
 using System.Web;
 using System.Text.RegularExpressions;
 using System.IO;

 public class UploadHandler : IHttpHandler {
     private string _filedir = "";    //文件目录
     /// <summary>
     /// 处理上传文件(1:文件格式不正确、2:文件大小不正确、3:上传失败、文件名称:上传成功)
     /// </summary>
     /// <param name="context"></param>
     public void ProcessRequest (HttpContext context) {
         _filedir = context.Server.MapPath(@"/file/temp/");
         try
         {
             string result = "3";
             string fileType = context.Request.QueryString["fileType"]; //获取上传文件类型
             if (fileType == "file")
             {
                 result = UploadFile(context);  //文档上传
             }
             else if (fileType == "img")
             {
                 result = UploadImg(context);   //图片上传
             }
             context.Response.Write(result);
         }
         catch
         {
             context.Response.Write("3");//3文件上传失败
         }
     }

     /// <summary>
     /// 文档上传
     /// </summary>
     /// <param name="context"></param>
     /// <returns></returns>
     private string UploadFile(HttpContext context)
     {
         int cout = context.Request.Files.Count;
         if (cout > 0)
         {
             HttpPostedFile hpf = context.Request.Files[0];
             if (hpf != null)
             {
                 string fileExt = Path.GetExtension(hpf.FileName).ToLower();
                 //只能上传文件，过滤不可上传的文件类型
                 string fileFilt = ".rar|.zip|.pdf|.pdfx|.txt|.csv|.xls|.xlsx|.doc|.docx......";
                 if (fileFilt.IndexOf(fileExt) <= -1)
                 {
                     return "1";
                 }

                 //判断文件大小
                 int length = hpf.ContentLength;
                 if (length > 2097152)
                 {
                     return "2";
                 }

                 Random rd = new Random();
                 DateTime nowTime = DateTime.Now;
                 string newFileName = nowTime.Year.ToString() + nowTime.Month.ToString() + nowTime.Day.ToString() + nowTime.Hour.ToString() + nowTime.Minute.ToString() + nowTime.Second.ToString() + rd.Next(1000, 1000000) + Path.GetExtension(hpf.FileName);
                 if (!Directory.Exists(_filedir))
                 {
                     Directory.CreateDirectory(_filedir);
                 }
                 string fileName = _filedir + newFileName;
                 hpf.SaveAs(fileName);
                 return newFileName;
             }

         }
         return "3";
     }

     /// <summary>
     /// 图片上传
     /// </summary>
     /// <param name="context"></param>
     /// <returns></returns>
     private string UploadImg(HttpContext context)
     {
         int cout = context.Request.Files.Count;
         if (cout > 0)
         {
             HttpPostedFile hpf = context.Request.Files[0];
             if (hpf != null)
             {
                 string fileExt = Path.GetExtension(hpf.FileName).ToLower();
                 //只能上传文件，过滤不可上传的文件类型
                 string fileFilt = ".gif|.jpg|.php|.jsp|.jpeg|.png|......";
                 if (fileFilt.IndexOf(fileExt) <= -1)
                 {
                     return "1";
                 }

                 //判断文件大小
                 int length = hpf.ContentLength;
                 if (length > 204800)
                 {
                     return "2";
                 }

                 Random rd = new Random();
                 DateTime nowTime = DateTime.Now;
                 string newFileName = nowTime.Year.ToString() + nowTime.Month.ToString() + nowTime.Day.ToString() + nowTime.Hour.ToString() + nowTime.Minute.ToString() + nowTime.Second.ToString() + rd.Next(1000, 1000000) + Path.GetExtension(hpf.FileName);
                 if (!Directory.Exists(_filedir))
                 {
                     Directory.CreateDirectory(_filedir);
                 }
                 string fileName = _filedir + newFileName;
                 hpf.SaveAs(fileName);
                 return newFileName;
             }

         }
         return "3";
     }

     #region IHttpHandler 成员

     public bool IsReusable
     {
         get { throw new NotImplementedException(); }
     }

     #endregion
 }

附件1：页面CSS样式

 /*上传文件*/
 .uploadFile{margin-bottom:10px;}
 /*上传图片*/
 .uploadImg{}
 .uploadImg img{width:102px; height:64px; border:1px solid #CCCCCC; display: block;}

附件2：AjaxUpload.js文件

 /**
  * AJAX Upload ( http://valums.com/ajax-upload/ )
  * Copyright (c) Andris Valums
  * Licensed under the MIT license ( http://valums.com/mit-license/ )
  * Thanks to Gary Haran, David Mark, Corey Burns and others for contributions
  */
 (function () {
     /* global window */
     /* jslint browser: true, devel: true, undef: true, nomen: true, bitwise: true, regexp: true, newcap: true, immed: true */

     /**
      * Wrapper for FireBug's console.log
      */

     function log() {
         if (typeof(console) != 'undefined' && typeof(console.log) == 'function') {
             Array.prototype.unshift.call(arguments, '[Ajax Upload]');
             console.log(Array.prototype.join.call(arguments, ' '));
         }
     }

     /**
      * Attaches event to a dom element.
      * @param {Element} el
      * @param type event name
      * @param fn callback This refers to the passed element
      */

     function addEvent(el, type, fn) {
         if (el.addEventListener) {
             el.addEventListener(type, fn, false);
         } else if (el.attachEvent) {
             el.attachEvent('on' + type, function () {
                 fn.call(el);
             });
         } else {
             throw new Error('not supported or DOM not loaded');
         }
     }

     /**
      * Attaches resize event to a window, limiting
      * number of event fired. Fires only when encounteres
      * delay of 100 after series of events.
      *
      * Some browsers fire event multiple times when resizing
      * http://www.quirksmode.org/dom/events/resize.html
      *
      * @param fn callback This refers to the passed element
      */

     function addResizeEvent(fn) {
         var timeout;

         addEvent(window, 'resize', function () {
             if (timeout) {
                 clearTimeout(timeout);
             }
             timeout = setTimeout(fn, 100);
         });
     }

     // Needs more testing, will be rewriten for next version
     // getOffset function copied from jQuery lib (http://jquery.com/)
     if (document.documentElement.getBoundingClientRect) {
         // Get Offset using getBoundingClientRect
         // http://ejohn.org/blog/getboundingclientrect-is-awesome/
         var getOffset = function (el) {
             var box = el.getBoundingClientRect();
             var doc = el.ownerDocument;
             var body = doc.body;
             var docElem = doc.documentElement; // for ie
             var clientTop = docElem.clientTop || body.clientTop || 0;
             var clientLeft = docElem.clientLeft || body.clientLeft || 0;

             // In Internet Explorer 7 getBoundingClientRect property is treated as physical,
             // while others are logical. Make all logical, like in IE8.
             var zoom = 1;
             if (body.getBoundingClientRect) {
                 var bound = body.getBoundingClientRect();
                 zoom = (bound.right - bound.left) / body.clientWidth;
             }

             if (zoom > 1) {
                 clientTop = 0;
                 clientLeft = 0;
             }

             var top = box.top / zoom + (window.pageYOffset || docElem && docElem.scrollTop / zoom || body.scrollTop / zoom) - clientTop,
                 left = box.left / zoom + (window.pageXOffset || docElem && docElem.scrollLeft / zoom || body.scrollLeft / zoom) - clientLeft;

             return {
                 top: top,
                 left: left
             };
         };
     } else {
         // Get offset adding all offsets
         var getOffset = function (el) {
             var top = 0,
                 left = 0;
             do {
                 top += el.offsetTop || 0;
                 left += el.offsetLeft || 0;
                 el = el.offsetParent;
             } while (el);

             return {
                 left: left,
                 top: top
             };
         };
     }

     /**
      * Returns left, top, right and bottom properties describing the border-box,
      * in pixels, with the top-left relative to the body
      * @param {Element} el
      * @return {Object} Contains left, top, right,bottom
      */

     function getBox(el) {
         var left, right, top, bottom;
         var offset = getOffset(el);
         left = offset.left;
         top = offset.top;

         right = left + el.offsetWidth;
         bottom = top + el.offsetHeight;

         return {
             left: left,
             right: right,
             top: top,
             bottom: bottom
         };
     }

     /**
      * Helper that takes object literal
      * and add all properties to element.style
      * @param {Element} el
      * @param {Object} styles
      */

     function addStyles(el, styles) {
         for (var name in styles) {
             if (styles.hasOwnProperty(name)) {
                 el.style[name] = styles[name];
             }
         }
     }

     /**
      * Function places an absolutely positioned
      * element on top of the specified element
      * copying position and dimentions.
      * @param {Element} from
      * @param {Element} to
      */

     function copyLayout(from, to) {
         var box = getBox(from);

         addStyles(to, {
             position: 'absolute',
             left: box.left + 'px',
             top: box.top + 'px',
             width: from.offsetWidth + 'px',
             height: from.offsetHeight + 'px'
         });
     }

     /**
      * Creates and returns element from html chunk
      * Uses innerHTML to create an element
      */
     var toElement = (function () {
         var div = document.createElement('div');
         return function (html) {
             div.innerHTML = html;
             var el = div.firstChild;
             return div.removeChild(el);
         };
     })();

     /**
      * Function generates unique id
      * @return unique id
      */
     var getUID = (function () {
         var id = 0;
         return function () {
             return 'ValumsAjaxUpload' + id++;
         };
     })();

     /**
      * Get file name from path
      * @param {String} file path to file
      * @return filename
      */

     function fileFromPath(file) {
         return file.replace(/.*(\/|\\)/, "");
     }

     /**
      * Get file extension lowercase
      * @param {String} file name
      * @return file extenstion
      */

     function getExt(file) {
         return (-1 !== file.indexOf('.')) ? file.replace(/.*[.]/, '') : '';
     }

     function hasClass(el, name) {
         var re = new RegExp('\\b' + name + '\\b');
         return re.test(el.className);
     }

     function addClass(el, name) {
         if (!hasClass(el, name)) {
             el.className += ' ' + name;
         }
     }

     function removeClass(el, name) {
         var re = new RegExp('\\b' + name + '\\b');
         el.className = el.className.replace(re, '');
     }

     function removeNode(el) {
         el.parentNode.removeChild(el);
     }

     /**
      * Easy styling and uploading
      * @constructor
      * @param button An element you want convert to
      * upload button. Tested dimentions up to 500x500px
      * @param {Object} options See defaults below.
      */
     window.AjaxUpload = function (button, options) {
         this._settings = {
             // Location of the server-side upload script
             action: 'upload.php',
             // File upload name
             name: 'userfile',
             // Additional data to send
             data: {},
             // Submit file as soon as it's selected
             autoSubmit: true,
             // The type of data that you're expecting back from the server.
             // html and xml are detected automatically.
             // Only useful when you are using json data as a response.
             // Set to "json" in that case.
             responseType: false,
             // Class applied to button when mouse is hovered
             hoverClass: 'hover',
             // Class applied to button when AU is disabled
             disabledClass: 'disabled',
             // When user selects a file, useful with autoSubmit disabled
             // You can return false to cancel upload
             onChange: function (file, extension) {},
             // Callback to fire before file is uploaded
             // You can return false to cancel upload
             onSubmit: function (file, extension) {},
             // Fired when file upload is completed
             // WARNING! DO NOT USE "FALSE" STRING AS A RESPONSE!
             onComplete: function (file, response) {}
         };

         // Merge the users options with our defaults
         for (var i in options) {
             if (options.hasOwnProperty(i)) {
                 this._settings[i] = options[i];
             }
         }

         // button isn't necessary a dom element
         if (button.jquery) {
             // jQuery object was passed
             button = button[0];
         } else if (typeof button == "string") {
             if (/^#.*/.test(button)) {
                 // If jQuery user passes #elementId don't break it
                 button = button.slice(1);
             }

             button = document.getElementById(button);
         }

         if (!button || button.nodeType !== 1) {
             throw new Error("Please make sure that you're passing a valid element");
         }

         if (button.nodeName.toUpperCase() == 'A') {
             // disable link
             addEvent(button, 'click', function (e) {
                 if (e && e.preventDefault) {
                     e.preventDefault();
                 } else if (window.event) {
                     window.event.returnValue = false;
                 }
             });
         }

         // DOM element
         this._button = button;
         // DOM element
         this._input = null;
         // If disabled clicking on button won't do anything
         this._disabled = false;

         // if the button was disabled before refresh if will remain
         // disabled in FireFox, let's fix it
         this.enable();

         this._rerouteClicks();
     };

     // assigning methods to our class
     AjaxUpload.prototype = {
         setData: function (data) {
             this._settings.data = data;
         },
         disable: function () {
             addClass(this._button, this._settings.disabledClass);
             this._disabled = true;

             var nodeName = this._button.nodeName.toUpperCase();
             if (nodeName == 'INPUT' || nodeName == 'BUTTON') {
                 this._button.setAttribute('disabled', 'disabled');
             }

             // hide input
             if (this._input) {
                 // We use visibility instead of display to fix problem with Safari 4
                 // The problem is that the value of input doesn't change if it
                 // has display none when user selects a file
                 this._input.parentNode.style.visibility = 'hidden';
             }
         },
         enable: function () {
             removeClass(this._button, this._settings.disabledClass);
             this._button.removeAttribute('disabled');
             this._disabled = false;

         },
         /**
          * Creates invisible file input
          * that will hover above the button
          * <div><input type='file' /></div>
          */
         _createInput: function () {
             var self = this;

             var input = document.createElement("input");
             input.setAttribute('type', 'file');
             input.setAttribute('name', this._settings.name);

             addStyles(input, {
                 'position': 'absolute',
                 // in Opera only 'browse' button
                 // is clickable and it is located at
                 // the right side of the input
                 'right': 0,
                 'margin': 0,
                 'padding': 0,
                 'fontSize': '480px',
                 'cursor': 'pointer'
             });

             var div = document.createElement("div");
             addStyles(div, {
                 'display': 'block',
                 'position': 'absolute',
                 'overflow': 'hidden',
                 'margin': 0,
                 'padding': 0,
                 'opacity': 0,
                 // Make sure browse button is in the right side
                 // in Internet Explorer
                 'direction': 'ltr',
                 //Max zIndex supported by Opera 9.0-9.2
                 'zIndex': 2147483583
             });

             // Make sure that element opacity exists.
             // Otherwise use IE filter
             if (div.style.opacity !== "0") {
                 if (typeof(div.filters) == 'undefined') {
                     throw new Error('Opacity not supported by the browser');
                 }
                 div.style.filter = "alpha(opacity=0)";
             }

             addEvent(input, 'change', function () {

                 if (!input || input.value === '') {
                     return;
                 }

                 // Get filename from input, required
                 // as some browsers have path instead of it
                 var file = fileFromPath(input.value);

                 if (false === self._settings.onChange.call(self, file, getExt(file))) {
                     self._clearInput();
                     return;
                 }

                 // Submit form when value is changed
                 if (self._settings.autoSubmit) {
                     self.submit();
                 }
             });

             addEvent(input, 'mouseover', function () {
                 addClass(self._button, self._settings.hoverClass);
             });

             addEvent(input, 'mouseout', function () {
                 removeClass(self._button, self._settings.hoverClass);

                 // We use visibility instead of display to fix problem with Safari 4
                 // The problem is that the value of input doesn't change if it
                 // has display none when user selects a file
                 input.parentNode.style.visibility = 'hidden';

             });

             div.appendChild(input);
             document.body.appendChild(div);

             this._input = input;
         },
         _clearInput: function () {
             if (!this._input) {
                 return;
             }

             // this._input.value = ''; Doesn't work in IE6
             removeNode(this._input.parentNode);
             this._input = null;
             this._createInput();

             removeClass(this._button, this._settings.hoverClass);
         },
         /**
          * Function makes sure that when user clicks upload button,
          * the this._input is clicked instead
          */
         _rerouteClicks: function () {
             var self = this;

             // IE will later display 'access denied' error
             // if you use using self._input.click()
             // other browsers just ignore click()

             addEvent(self._button, 'mouseover', function () {
                 if (self._disabled) {
                     return;
                 }

                 if (!self._input) {
                     self._createInput();
                 }

                 var div = self._input.parentNode;
                 copyLayout(self._button, div);
                 div.style.visibility = 'visible';

             });


             // commented because we now hide input on mouseleave
             /**
              * When the window is resized the elements
              * can be misaligned if button position depends
              * on window size
              */
             //addResizeEvent(function(){
             //    if (self._input){
             //        copyLayout(self._button, self._input.parentNode);
             //    }
             //});

         },
         /**
          * Creates iframe with unique name
          * @return {Element} iframe
          */
         _createIframe: function () {
             // We can't use getTime, because it sometimes return
             // same value in safari :(
             var id = getUID();

             // We can't use following code as the name attribute
             // won't be properly registered in IE6, and new window
             // on form submit will open
             // var iframe = document.createElement('iframe');
             // iframe.setAttribute('name', id);

             var iframe = toElement('<iframe src="javascript:false;" name="' + id + '" />');
             // src="javascript:false; was added
             // because it possibly removes ie6 prompt
             // "This page contains both secure and nonsecure items"
             // Anyway, it doesn't do any harm.
             iframe.setAttribute('id', id);

             iframe.style.display = 'none';
             document.body.appendChild(iframe);

             return iframe;
         },
         /**
          * Creates form, that will be submitted to iframe
          * @param {Element} iframe Where to submit
          * @return {Element} form
          */
         _createForm: function (iframe) {
             var settings = this._settings;

             // We can't use the following code in IE6
             // var form = document.createElement('form');
             // form.setAttribute('method', 'post');
             // form.setAttribute('enctype', 'multipart/form-data');
             // Because in this case file won't be attached to request
             var form = toElement('<form method="post" enctype="multipart/form-data"></form>');

             form.setAttribute('action', settings.action);
             form.setAttribute('target', iframe.name);
             form.style.display = 'none';
             document.body.appendChild(form);

             // Create hidden input element for each data key
             for (var prop in settings.data) {
                 if (settings.data.hasOwnProperty(prop)) {
                     var el = document.createElement("input");
                     el.setAttribute('type', 'hidden');
                     el.setAttribute('name', prop);
                     el.setAttribute('value', settings.data[prop]);
                     form.appendChild(el);
                 }
             }
             return form;
         },
         /**
          * Gets response from iframe and fires onComplete event when ready
          * @param iframe
          * @param file Filename to use in onComplete callback
          */
         _getResponse: function (iframe, file) {
             // getting response
             var toDeleteFlag = false,
                 self = this,
                 settings = this._settings;

             addEvent(iframe, 'load', function () {

                 if ( // For Safari
                 iframe.src == "javascript:'%3Chtml%3E%3C/html%3E';" ||
                 // For FF, IE
                 iframe.src == "javascript:'<html></html>';") {
                     // First time around, do not delete.
                     // We reload to blank page, so that reloading main page
                     // does not re-submit the post.

                     if (toDeleteFlag) {
                         // Fix busy state in FF3
                         setTimeout(function () {
                             removeNode(iframe);
                         },
                         0);
                     }

                     return;
                 }

                 var doc = iframe.contentDocument ? iframe.contentDocument : window.frames[iframe.id].document;

                 // fixing Opera 9.26,10.00
                 if (doc.readyState && doc.readyState != 'complete') {
                     // Opera fires load event multiple times
                     // Even when the DOM is not ready yet
                     // this fix should not affect other browsers
                     return;
                 }

                 // fixing Opera 9.64
                 if (doc.body && doc.body.innerHTML == "false") {
                     // In Opera 9.64 event was fired second time
                     // when body.innerHTML changed from false
                     // to server response approx. after 1 sec
                     return;
                 }

                 var response;

                 if (doc.XMLDocument) {
                     // response is a xml document Internet Explorer property
                     response = doc.XMLDocument;
                 } else if (doc.body) {
                     // response is html document or plain text
                     response = doc.body.innerHTML;

                     if (settings.responseType && settings.responseType.toLowerCase() == 'json') {
                         // If the document was sent as 'application/javascript' or
                         // 'text/javascript', then the browser wraps the text in a <pre>
                         // tag and performs html encoding on the contents.  In this case,
                         // we need to pull the original text content from the text node's
                         // nodeValue property to retrieve the unmangled content.
                         // Note that IE6 only understands text/html
                         if (doc.body.firstChild && doc.body.firstChild.nodeName.toUpperCase() == 'PRE') {
                             response = doc.body.firstChild.firstChild.nodeValue;
                         }

                         if (response) {
                             response = eval("(" + response + ")");
                         } else {
                             response = {};
                         }
                     }
                 } else {
                     // response is a xml document
                     response = doc;
                 }

                 settings.onComplete.call(self, file, response);

                 // Reload blank page, so that reloading main page
                 // does not re-submit the post. Also, remember to
                 // delete the frame
                 toDeleteFlag = true;

                 // Fix IE mixed content issue
                 iframe.src = "javascript:'<html></html>';";
             });
         },
         /**
          * Upload file contained in this._input
          */
         submit: function () {
             var self = this,
                 settings = this._settings;

             if (!this._input || this._input.value === '') {
                 return;
             }

             var file = fileFromPath(this._input.value);

             // user returned false to cancel upload
             if (false === settings.onSubmit.call(this, file, getExt(file))) {
                 this._clearInput();
                 return;
             }

             // sending request
             var iframe = this._createIframe();
             var form = this._createForm(iframe);

             // assuming following structure
             // div -> input type='file'
             removeNode(this._input.parentNode);
             removeClass(self._button, self._settings.hoverClass);

             form.appendChild(this._input);

             form.submit();

             // request set, clean up
             removeNode(form);
             form = null;
             removeNode(this._input);
             this._input = null;

             // Get response from iframe and fire onComplete event when ready
             this._getResponse(iframe, file);

             // get ready for next request
             this._createInput();
         }
     };
 })();