在JavaScript中如何解决用execCommand(

 function CmdSave() {
  var OW = window.open('', "_blank", "");
  var DD = new Date();
  OW.document.open();
  var content = document.getElementById("content").innerHTML;
  OW.document.write(content);
  var name = mineName + "-" + $("#selDate").val() + ".htm";
  OW.document.execCommand("saveAs", false, name);//执行保存，IE6,IE7,IE8有效
  OW.close();
 }

 function CmdSave() {
  var css = "<style type='text/css'>.trNormalTd { border-top-width: 0px; border-bottom-width: 0px;text-align:right;}.trLastTd {border-top-width: 0px;text-align:right;}.trFirstTd{border-bottom-width: 0px;text-align: right;}</style>";
  var html = document.getElementById("content").innerHTML;
  var content = css + html;
  var name = mineName + "-" + $("#selDate").val() + ".htm";
  savePage(content, name);
}
 //content 内容 fileName 文件名 先在服务器生成页面，然后再下载生成的页面
 function savePage(content, fileName) {
  $.ajax({
   type: 'post',
   dataType: 'text',
   url: 'FXBB/BCYM',
   data: {
    content: content,
    fileName: fileName
   },
   success: function (result) {
    var url = "YXGZ/DBFX/BBCX/FXBB/XZYM?fileName=" + fileName;
    var downloadUrl = window.location.protocol + "//" + window.location.host + "/" + url;
    window.open(downloadUrl);//下载页面
    //deleteFile(fileName);
   },
   error: function (msg) {
    alert("保存出错");
   }
  });
 }
  //保存页面
  public int BCYM(string content, string fileName)
  {
   string path = System.AppDomain.CurrentDomain.BaseDirectory;
   path = Path.Combine(path, @"Upload\FXBB");
   //清空保存文件文件夹文件
   foreach (string d in Directory.GetFileSystemEntries(path))
   {
    if (File.Exists(d))
    {
     File.Delete(d);
    }
   }
   //生成要保存的页面
   path = System.AppDomain.CurrentDomain.BaseDirectory;
   path = Path.Combine(path, "Upload/FXBB/" + fileName);
   using (StreamWriter sw = new StreamWriter(path, false, Encoding.UTF8))// File.AppendText(path))
   {
    sw.WriteLine(content);
    sw.Flush();
   }
   return 1;
  }
//下载页面
  public void XZYM(string fileName)
  {
   string path = System.AppDomain.CurrentDomain.BaseDirectory;
   path = Path.Combine(path, @"Upload\FXBB\" + fileName);
   string filePath = path;//Server.MapPath("DownLoad/aaa.zip");//路径
   //以字符流的形式下载文件
   FileStream fs = new FileStream(filePath, FileMode.Open);
   byte[] bytes = new byte[(int)fs.Length];
   fs.Read(bytes, 0, bytes.Length);
   fs.Close();
   System.Web.HttpContext.Current.Response.ContentType = "application/octet-stream";
   //通知浏览器下载文件而不是打开
   System.Web.HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF8));
   System.Web.HttpContext.Current.Response.WriteFile(filePath);
  }