b2csys/WebRoot/commfiles/js/QuickUpload.js

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var QuickUpload = function(file, options) {
	
	this.file = $$(file);
	
	this._sending = false;//是否正在上传
	this._timer = null;//定时器
	this._iframe = null;//iframe对象
	this._form = null;//form对象
	this._inputs = {};//input对象
	this._fFINISH = null;//完成执行函数
	
	$$.extend(this, this._setOptions(options));
};
QuickUpload._counter = 1;
QuickUpload.prototype = {
  //设置默认属性
  _setOptions: function(options) {
    this.options = {//默认值
		action:		"",//设置action
		timeout:	0,//设置超时(秒为单位)
		parameter:	{},//参数对象
		onReady:	function(){},//上传准备时执行
		onFinish:	function(){},//上传完成时执行
		onStop:		function(){},//上传停止时执行
		onTimeout:	function(){}//上传超时时执行
    };
    return $$.extend(this.options, options || {});
  },
  //上传文件
  upload: function() {
	//停止上一次上传
	this.stop();
	//没有文件返回
	if ( !this.file || !this.file.value ) return;
	//可能在onReady中修改相关属性所以放前面
	this.onReady();
	//设置iframe,form和表单控件
	this._setIframe();
	this._setForm();
	this._setInput();
	//设置超时
	if ( this.timeout > 0 ) {
		this._timer = setTimeout( $$F.bind(this._timeout, this), this.timeout * 1000 );
	}
	//开始上传
	this._form.submit();
	this._sending = true;
  },
  //设置iframe
  _setIframe: function() {
	if ( !this._iframe ) {
		//创建iframe
		var iframename = "QUICKUPLOAD_" + QuickUpload._counter++,
			iframe = document.createElement( $$B.ie ? "<iframe name=\"" + iframename + "\">" : "iframe");
		iframe.name = iframename;
		iframe.style.display = "none";
		//记录完成程序方便移除
		var finish = this._fFINISH = $$F.bind(this._finish, this);
		//iframe加载完后执行完成程序
		if ( $$B.ie ) {