jQuery.extend({ createUploadIframe: function (id,uri) { //create frame var frameId = 'jUploadFrame' + id; var iframeHtml = '<iframe id="' + frameId + '" name="' + frameId + '" style="position:absolute; top:-9999px; left:-9999px"'; if (window.ActiveXObject) { if (typeof uri == 'boolean') { iframeHtml += ' src="' + 'javascript:false' + '"'; } else if (typeof uri == 'string') { iframeHtml += ' src="' + uri + '"'; } } iframeHtml += ' />'; jQuery(iframeHtml).appendTo(document.body); return jQuery('#' + frameId).get(0); },createUploadForm: function (id,fileElementId,data) { //create form var formId = 'jUploadForm' + id; var fileId = 'jUploadFile' + id; var form = jQuery('<form action="" method="POST" name="' + formId + '" id="' + formId + '" enctype="multipart/form-data"></form>'); if (data) { for (var i in data) { jQuery('<input type="hidden" name="' + i + '" value="' + data[i] + '" />').appendTo(form); } } var oldElement = jQuery('#' + fileElementId); var newElement = jQuery(oldElement).clone(true); jQuery(oldElement).attr('id',fileId); jQuery(oldElement).before(newElement); jQuery(oldElement).appendTo(form); //set attributes jQuery(form).css('position','absolute'); jQuery(form).css('top','-1200px'); jQuery(form).css('left','-1200px'); jQuery(form).appendTo('body'); return form; },ajaxFileUpload: function (s) { // TODO introduce global settings,allowing the client to modify them for all requests,not only timeout s = jQuery.extend({},jQuery.ajaxSettings,s); var id = new Date().getTime() var form = jQuery.createUploadForm(id,s.fileElementId,(typeof (s.data) == 'undefined' ? false : s.data)); var io = jQuery.createUploadIframe(id,s.secureuri); var frameId = 'jUploadFrame' + id; var formId = 'jUploadForm' + id; // Watch for a new set of requests if (s.global && !jQuery.active++) { jQuery.event.trigger("ajaxStart"); } var requestDone = false; // Create the request object var xml = {} if (s.global) jQuery.event.trigger("ajaxSend",[xml,s]); // Wait for a response to come back var uploadCallback = function (isTimeout) { var io = document.getElementById(frameId); try { if (io.contentWindow) { xml.responseText = io.contentWindow.document.body ? io.contentWindow.document.body.innerHTML : null; xml.responseXML = io.contentWindow.document.XMLDocument ? io.contentWindow.document.XMLDocument : io.contentWindow.document; } else if (io.contentDocument) { xml.responseText = io.contentDocument.document.body ? io.contentDocument.document.body.innerHTML : null; xml.responseXML = io.contentDocument.document.XMLDocument ? io.contentDocument.document.XMLDocument : io.contentDocument.document; } } catch (e) { jQuery.handleError(s,xml,null,e); } if (xml || isTimeout == "timeout") { requestDone = true; var status; try { status = isTimeout != "timeout" ? "success" : "error"; // Make sure that the request was successful or notmodified if (status != "error") { // process the data (runs the xml through httpData regardless of callback) var data = jQuery.uploadHttpData(xml,s.dataType); // If a local callback was specified,fire it and pass it the data if (s.success) s.success(data,status); // Fire the global callback if (s.global) jQuery.event.trigger("ajaxSuccess",s]); } else jQuery.handleError(s,status); } catch (e) { status = "error"; jQuery.handleError(s,status,e); } // The request was completed if (s.global) jQuery.event.trigger("ajaxComplete",s]); // Handle the global AJAX counter if (s.global && ! --jQuery.active) jQuery.event.trigger("ajaxStop"); // Process result if (s.complete) s.complete(xml,status); jQuery(io).unbind() setTimeout(function () { try { jQuery(io).remove(); jQuery(form).remove(); } catch (e) { jQuery.handleError(s,e); } },100) xml = null } } // Timeout checker if (s.timeout > 0) { setTimeout(function () { // Check to see if the request is still happening if (!requestDone) uploadCallback("timeout"); },s.timeout); } try { var form = jQuery('#' + formId); jQuery(form).attr('action',s.url); jQuery(form).attr('method','POST'); jQuery(form).attr('target',frameId); if (form.encoding) { jQuery(form).attr('encoding','multipart/form-data'); } else { jQuery(form).attr('enctype','multipart/form-data'); } jQuery(form).submit(); } catch (e) { jQuery.handleError(s,e); } jQuery('#' + frameId).load(uploadCallback); return { abort: function () { } }; },uploadHttpData: function (r,type) { var data = !type; data = type == "xml" || data ? r.responseXML : r.responseText; // If the type is "script",eval it in global context if (type == "script") jQuery.globalEval(data); // Get the JavaScript object,if JSON is used. if (type == "json") eval("data = " + data); // evaluate scripts within html if (type == "html") jQuery("<div>").html(data).evalScripts(); return data; },handleError: function (s,xhr,e) { // If a local callback was specified,fire it if (s.error) { s.error.call(s.context || s,e); } // Fire the global callback if (s.global) { (s.context ? jQuery(s.context) : jQuery.event).trigger("ajaxError",[xhr,s,e]); } } })
var newElement = jQuery(oldElement).clone(true);