/*直接复制在自己的js文件中就能使用*/

jquery.extend({

createuploadiframe: function (id, uri) {

//create frame

var frameid = 'juploadframe' + id;

if (window.activexobject) {

var io = document.createelement('');

if (typeof uri == 'boolean') {

io.src = 'javascript:false';

}

else if (typeof uri == 'string') {

io.src = uri;

}

}

else {

var io = document.createelement('iframe');

io.id = frameid;

io.name = frameid;

}

io.style.position = 'absolute';

io.style.top = '-1000px';

io.style.left = '-1000px';

document.body.appendchild(io);

return io

},

createuploadform: function (id, fileelementid, data) {

//create form

var formid = 'juploadform' + id;

var fileid = 'juploadfile' + id;

var form = $('

');

var oldelement = $('#' + fileelementid);

var newelement = $(oldelement).clone();

$(oldelement).attr('id', fileid);

$(oldelement).before(newelement);

$(oldelement).appendto(form);

//增加文本参数的支持,修改本处,本处应有掌声

if (data) {

for (var i in data) {

var temp = $('');

temp.val(data[i]);

temp.appendto(form);

}

}

//set attributes

$(form).css('position', 'absolute');

$(form).css('top', '-1200px');

$(form).css('left', '-1200px');

$(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, 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", [xml, s]);

} else

jquery.handleerror(s, xml, status);

} catch (e) {

status = "error";

jquery.handleerror(s, xml, status, e);

}

// the request was completed

if (s.global)

jquery.event.trigger("ajaxcomplete", [xml, 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 {

$(io).remove();

$(form).remove();

} catch (e) {

jquery.handleerror(s, xml, null, 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 io = $('#' + frameid);

var form = $('#' + formid);

$(form).attr('action', s.url);

$(form).attr('method', 'post');

$(form).attr('target', frameid);

if (form.encoding) {

form.encoding = 'multipart/form-data';

}

else {

form.enctype = 'multipart/form-data';

}

$(form).submit();

} catch (e) {

jquery.handleerror(s, xml, null, e);

}

if (window.attachevent) {

document.getelementbyid(frameid).attachevent('onload', uploadcallback);

}

else {

document.getelementbyid(frameid).addeventlistener('load', uploadcallback, false);

}

return { abort: function () { } };

},

uploadhttpdata: function (r, type) {

/*源代码

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("