下面功能是导出页面表格到execl中，在Chrome正常导出，在ie10和firefox导出却是页面文件，求指导。

$("#btnexport").click(function (e) {            

  e.preventDefault();

  var period = new Date().getTime();            

  var product = $.trim($("#schproduct").val());            

  var supplier = $.trim($("#schsupplier").val());            

  if (!downloadFrame) {                

    downloadFrame = document.createElement("iframe");

    document.body.appendChild(downloadFrame); 

    downloadFrame.style.display = "none";            

  }

  downloadFrame.src = "/**/**.aspx?period=" + period + "&product=" + product + "&supplier=" + supplier;            

  setTimeout("downloadFrame.src=''", 6000);        

});