js与flash交互操作1

//flash里传送值
'<param name="flashvars" value="' + this.getFlashVars() + '" />'
//flash里获取值
this.uploadURL=root.loaderinfo.parameters.uploadURL

SWFUpload.prototype.getFlashVars = function () {
   // Build a string from the post param object
   var paramString = this.buildParamString();
   var httpSuccessString = this.settings.http_success.join(",");
   
   // Build the parameter string
   return ["movieName=", encodeURIComponent(this.movieName),
           "&amp;uploadURL=", encodeURIComponent(this.settings.upload_url),
           "&amp;useQueryString=", encodeURIComponent

(this.settings.use_query_string),
           "&amp;requeueOnError=", encodeURIComponent

(this.settings.requeue_on_error),
           "&amp;httpSuccess=", encodeURIComponent(httpSuccessString),
           "&amp;assumeSuccessTimeout=", encodeURIComponent

(this.settings.assume_success_timeout),
           "&amp;params=", encodeURIComponent(paramString),
           "&amp;filePostName=", encodeURIComponent

(this.settings.file_post_name),
           "&amp;fileTypes=", encodeURIComponent(this.settings.file_types),
           "&amp;fileTypesDescription=", encodeURIComponent

(this.settings.file_types_description),
           "&amp;fileSizeLimit=", encodeURIComponent

(this.settings.file_size_limit),
           "&amp;fileUploadLimit=", encodeURIComponent

(this.settings.file_upload_limit),
           "&amp;fileQueueLimit=", encodeURIComponent

(this.settings.file_queue_limit),
           "&amp;debugEnabled=", encodeURIComponent

(this.settings.debug_enabled),
           "&amp;buttonImageURL=", encodeURIComponent

(this.settings.button_image_url),
           "&amp;buttonWidth=", encodeURIComponent(this.settings.button_width),
           "&amp;buttonHeight=", encodeURIComponent

(this.settings.button_height),
           "&amp;buttonText=", encodeURIComponent(this.settings.button_text),
           "&amp;buttonTextTopPadding=", encodeURIComponent

(this.settings.button_text_top_padding),
           "&amp;buttonTextLeftPadding=", encodeURIComponent

(this.settings.button_text_left_padding),
           "&amp;buttonTextStyle=", encodeURIComponent

(this.settings.button_text_style),
           "&amp;buttonAction=", encodeURIComponent

(this.settings.button_action),
           "&amp;buttonDisabled=", encodeURIComponent

(this.settings.button_disabled),
           "&amp;buttonCursor=", encodeURIComponent

(this.settings.button_cursor)
       ].join("");
};
//js调用flash中的方法
SWFUpload.prototype.callFlash = function (functionName, argumentArray) {
   argumentArray = argumentArray || [];
   
   var movieElement = this.getMovieElement();
   var returnValue, returnString;

   // Flash's method if calling ExternalInterface methods (code adapted from MooTools).
   try {
       returnString = movieElement.CallFunction('<invoke name="' + functionName +

'" returntype="javascript">' + __flash__argumentsToXML(argumentArray, 0) + '</invoke>');
       returnValue = eval(returnString);
   } catch (ex) {
       throw "Call to " + functionName + " failed";
   }
   
   // Unescape file post param values
   if (returnValue != undefined && typeof returnValue.post === "object") {
       returnValue = this.unescapeFilePostParams(returnValue);
   }

   return returnValue;
};
//调用
SWFUpload.prototype.getStats = function () {
   return this.callFlash("GetStats");
};
SWFUpload.prototype.getFile = function (fileID) {
   if (typeof(fileID) === "number") {
       return this.callFlash("GetFileByIndex", [fileID]);
   } else {
       return this.callFlash("GetFile", [fileID]);
   }
};
SWFUpload.prototype.addFileParam = function (fileID, name, value) {
   return this.callFlash("AddFileParam", [fileID, name, value]);
};

SWFUpload.prototype.getMovieElement = function () {
   if (this.movieElement == undefined) {//this.movieName就是flash object的id
       this.movieElement = document.getElementById(this.movieName);
   }

   if (this.movieElement === null) {
       throw "Could not find Flash element";
   }
   
   return this.movieElement;
};