if ( this.timeout > 0 ) {
this._timer = setTimeout( $$F.bind(this._timeout, this), this.timeout * 1000 );
}

var iframename = "QUICKUPLOAD_" + QuickUpload._counter++,
iframe = document.createElement( $$B.ie ? "iframe name=\"" + iframename + "\">" : "iframe");
iframe.name = iframename;
iframe.style.display = "none";

var finish = this._fFINISH = $$F.bind(this._finish, this);
if ( $$B.ie ) {
iframe.attachEvent( "onload", finish );
} else {
iframe.onload = $$B.opera ? function(){ this.onload = finish; } : finish;
}

body>div id="msg">狀態(tài)：/div>/body>
script>
var msg = document.getElementById("msg");
var iframe = document.createElement("iframe");
iframe.onload = function(){ msg.innerHTML += "onload,"; }
document.body.appendChild(iframe);
iframe.src = "http://cloudgamer.cnblogs.com/"
/script>

body>
div id="msg">狀態(tài)：/div>
form action="http://cloudgamer.cnblogs.com/" target="ifr">
/form>
/body>
script>
var msg = document.getElementById("msg");
var iframe = document.createElement("iframe");
iframe.name = "ifr";
iframe.onload = function(){ msg.innerHTML += "onload,"; }
document.body.appendChild(iframe);
msg.innerHTML += "submit,";
document.forms[0].submit();
/script>

$$.extend(form, {
target: this._iframe.name, method: "post", encoding: "multipart/form-data"
});

$$D.setStyle(form, {
padding: 0, margin: 0, border: 0,
backgroundColor: "transparent", display: "inline"
});

for ( name in this.parameter ) {
var input = form[name];
if ( !input ) {
input = document.createElement("input");
input.name = name; input.type = "hidden";
form.appendChild(input);
}
input.value = this.parameter[name];
newInputs[name] = input;
delete oldInputs[name];
}

body>
iframe id="ifr" name="ifr">/iframe>
form action="http://cloudgamer.cnblogs.com/" target="ifr">
/form>
/body>
script>
document.forms[0].submit();
document.getElementById("ifr").src = "";
/script>

form target="ifr" action="x">
input id="btn" type="submit" value="click">
/form>
iframe name="ifr" id="ifr">/iframe>
script>
document.getElementById("btn").onclick = function(){
document.getElementById("ifr").onload = function(){
this.parentNode.removeChild(this);
};
}
/script>

if ( $$B.firefox ) {
setTimeout($$F.bind(this._removeIframe, this), 0);
} else {
this._removeIframe();
}

var form = this._form, parent = form.parentNode;
if ( parent ) {
parent.insertBefore(this.file, form); parent.removeChild(form);
}
this._form = this._inputs = null;

with(file.parentNode.insertBefore(document.createElement('form'), file)){
appendChild(file); reset(); removeNode(false);
}

form>input id="test" name="file" type="file">/form>
script>
document.getElementById("test").onchange = function(){
this.select(); document.selection.clear();
this.form.submit();
}
/script>

function ResetFile(file){
file.value = "";//ff chrome safari
if ( file.value ) {
if ( $$B.ie ) {//ie
with(file.parentNode.insertBefore(document.createElement('form'), file)){
appendChild(file); reset(); removeNode(false);
}
} else {//opera
file.type = "text"; file.type = "file";
}
}
}

try{
var info = eval("(" + iframe.contentWindow.document.body.innerHTML + ")");
show("上傳完成");
}catch(e){
show("上傳失敗"); stop(); return;
}

var QuickUpload = function(file, options) {

this.file = $$(file);

this._sending = false;//是否正在上傳
this._timer = null;//定時(shí)器
this._iframe = null;//iframe對(duì)象
this._form = null;//form對(duì)象
this._inputs = {};//input對(duì)象
this._fFINISH = null;//完成執(zhí)行函數(shù)

$$.extend(this, this._setOptions(options));
};
QuickUpload._counter = 1;
QuickUpload.prototype = {
//設(shè)置默認(rèn)屬性
_setOptions: function(options) {
this.options = {//默認(rèn)值
action: "",//設(shè)置action
timeout: 0,//設(shè)置超時(shí)(秒為單位)
parameter: {},//參數(shù)對(duì)象
onReady: function(){},//上傳準(zhǔn)備時(shí)執(zhí)行
onFinish: function(){},//上傳完成時(shí)執(zhí)行
onStop: function(){},//上傳停止時(shí)執(zhí)行
onTimeout: function(){}//上傳超時(shí)時(shí)執(zhí)行
};
return $$.extend(this.options, options || {});
},
//上傳文件
upload: function() {
//停止上一次上傳
this.stop();
//沒有文件返回
if ( !this.file || !this.file.value ) return;
//可能在onReady中修改相關(guān)屬性所以放前面
this.onReady();
//設(shè)置iframe,form和表單控件
this._setIframe();
this._setForm();
this._setInput();
//設(shè)置超時(shí)
if ( this.timeout > 0 ) {
this._timer = setTimeout( $$F.bind(this._timeout, this), this.timeout * 1000 );
}
//開始上傳
this._form.submit();
this._sending = true;
},
//設(shè)置iframe
_setIframe: function() {
if ( !this._iframe ) {
//創(chuàng)建iframe
var iframename = "QUICKUPLOAD_" + QuickUpload._counter++,
iframe = document.createElement( $$B.ie ? "iframe name=\"" + iframename + "\">" : "iframe");
iframe.name = iframename;
iframe.style.display = "none";
//記錄完成程序方便移除
var finish = this._fFINISH = $$F.bind(this._finish, this);
//iframe加載完后執(zhí)行完成程序
if ( $$B.ie ) {
iframe.attachEvent( "onload", finish );
} else {
iframe.onload = $$B.opera ? function(){ this.onload = finish; } : finish;
}
//插入body
var body = document.body; body.insertBefore( iframe, body.childNodes[0] );

this._iframe = iframe;
}
},
//設(shè)置form
_setForm: function() {
if ( !this._form ) {
var form = document.createElement('form'), file = this.file;
//設(shè)置屬性
$$.extend(form, {
target: this._iframe.name, method: "post", encoding: "multipart/form-data"
});
//設(shè)置樣式
$$D.setStyle(form, {
padding: 0, margin: 0, border: 0,
backgroundColor: "transparent", display: "inline"
});
//提交前去掉form
file.form $$E.addEvent(file.form, "submit", $$F.bind(this.dispose, this));
//插入form
file.parentNode.insertBefore(form, file).appendChild(file);

this._form = form;
}
//action可能會(huì)修改
this._form.action = this.action;
},
//設(shè)置input
_setInput: function() {
var form = this._form, oldInputs = this._inputs, newInputs = {}, name;
//設(shè)置input
for ( name in this.parameter ) {
var input = form[name];
if ( !input ) {
//如果沒有對(duì)應(yīng)input新建一個(gè)
input = document.createElement("input");
input.name = name; input.type = "hidden";
form.appendChild(input);
}
input.value = this.parameter[name];
//記錄當(dāng)前input
newInputs[name] = input;
//刪除已有記錄
delete oldInputs[name];
}
//移除無用input
for ( name in oldInputs ) { form.removeChild( oldInputs[name] ); }
//保存當(dāng)前input
this._inputs = newInputs;
},
//停止上傳
stop: function() {
if ( this._sending ) {
this._sending = false;
clearTimeout(this._timer);
//重置iframe
if ( $$B.opera ) {//opera通過設(shè)置src會(huì)有問題
this._removeIframe();
} else {
this._iframe.src = "";
}
this.onStop();
}
},
//銷毀程序
dispose: function() {
this._sending = false;
clearTimeout(this._timer);
//清除iframe
if ( $$B.firefox ) {
setTimeout($$F.bind(this._removeIframe, this), 0);
} else {
this._removeIframe();
}
//清除form
this._removeForm();
//清除dom關(guān)聯(lián)
this._inputs = this._fFINISH = this.file = null;
},
//清除iframe
_removeIframe: function() {
if ( this._iframe ) {
var iframe = this._iframe;
$$B.ie ? iframe.detachEvent( "onload", this._fFINISH ) : ( iframe.onload = null );
document.body.removeChild(iframe); this._iframe = null;
}
},
//清除form
_removeForm: function() {
if ( this._form ) {
var form = this._form, parent = form.parentNode;
if ( parent ) {
parent.insertBefore(this.file, form); parent.removeChild(form);
}
this._form = this._inputs = null;
}
},
//超時(shí)函數(shù)
_timeout: function() {
if ( this._sending ) { this._sending = false; this.stop(); this.onTimeout(); }
},
//完成函數(shù)
_finish: function() {
if ( this._sending ) { this._sending = false; this.onFinish(this._iframe); }
}
}