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当用户单击“取消”按钮时,我试图阻止文件上传。为此,我正在考虑停止 iframe 内的传输。问题是能够正确编码。下面是我想要实现的代码,但是当我单击“取消”按钮时出现此错误:

Uncaught exception: [Exception.... “Not enough arguments [nslDOMHTML.Document.execCommand]” nresult: “0x80570001 (NS_ERROR_XPC_NOT_ENOUGH_ARGS)” location: “JS frame;; https://......../QandATable.php = <TOP_LEVEL> ;; line 765” data: no]

首先如何修复此错误,其次如何正确编写下面的代码,以便在单击“取消”按钮时停止 iframe 内的传输?

下面是开始上传文件的 startImageUpload() 函数。在该函数中是处理单击“取消”按钮的函数;

function startImageUpload(imageuploadform){


              $(".imageCancel").click(function() {
              $('.upload_target')[0].contentwindow

              if ($('.upload_target')[0].contentWindow.document.execCommand)
    { // IE browsers
       $('.upload_target')[0].contentWindow.document.execCommand('Stop');
    }
else
    { // other browsers
        $('.upload_target')[0].contentWindow.stop();
    }


          return stopImageUpload();

    });

      return true;
}

以下是包含 iframe 的表单代码:

 var $fileImage = $("<form action='imageupload.php' method='post' enctype='multipart/form-data' target='upload_target' onsubmit='return startImageUpload(this);' class='imageuploadform' >" + 
    "Image File: <input name='fileImage' type='file' class='fileImage' /></label><br/><br/><label class='imagelbl'>" + 
    "<input type='submit' name='submitImageBtn' class='sbtnimage' value='Upload' /></label>" + 
    "</p><p class='imagef1_cancel' align='center'><label>" + 
    "<input type='button' name='imageCancel' class='imageCancel' value='Cancel' /></label></p>" + 
    "<iframe class='upload_target' name='upload_target' src='#' style='width:0;height:0;border:0px;solid;#fff;'></iframe></form>"); 
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1 回答 1

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根据MSDN,该Stop命令不受支持。

于 2012-05-03T19:00:58.310 回答