var idTmr;

      function  getExplorer() {

          var explorer = window.navigator.userAgent ;

          //ie

          if (explorer.indexOf("MSIE") >= 0) {

              return 'ie';

          } else if(window.ActiveXObject || "ActiveXObject" in window){

              return 'ie11';

          }

          //firefox

          else if (explorer.indexOf("Firefox") >= 0) {

              return 'Firefox';

          }

          //Chrome

          else if(explorer.indexOf("Chrome") >= 0){

              return 'Chrome';

          }

          //Opera

          else if(explorer.indexOf("Opera") >= 0){

              return 'Opera';

          }

          //Safari

          else if(explorer.indexOf("Safari") >= 0){

              return 'Safari';

          }

      }

      function exportExcel(tableid) {

          if(getExplorer()=='ie'){

              try{

              var curTbl = document.getElementById(tableid);

              //创建AX对象excel

              var oXL = new ActiveXObject("Excel.Application");

              //获取workbook对象

              var oWB = oXL.Workbooks.Add();

              //获取在workbook中读取第一个sheet

              var xlsheet = oWB.Worksheets(1);

              //创建TextRange

              var sel = document.body.createTextRange();

            //把表格中的内容移到TextRange中

              sel.moveToElementText(curTbl);

              //选中数据

              sel.select();

              //模拟复制

              sel.execCommand("Copy");

              //模拟粘贴

              xlsheet.Paste();

              //打开 excel界面

             oXL.Visible = true;

              var fname = oXL.Application.GetSaveAsFilename("Excel", "Excel Spreadsheets (*.xls)");

              } catch (e) {

                  dialogAlert("提示: 须允许ActiveX控件运行才能导出Excel文件!\n\n或<br>如果您确信您的电脑中已经安装了Excel，"+"那么请调整IE的安全级别。\n\n具体操作：\n\n"+"工具 → Internet选项 → 安全 → 自定义级别 → 对没有标记为安全的ActiveX进行初始化和脚本运行 → 启用",

                          '',function(){

                      var form=document.forms[0];

                      form.action=location.href+'?timestamp=' + new Date().getTime();

                      form.submit();

                      console.log(location.href);

                  });

                  return false;

              } finally {

                  oWB.SaveAs(fname);

                  oWB.Close(savechanges = true);

                  oXL.Quit();

                  idTmr = window.setInterval("Cleanup();", 1);

              }  

          }else if(getExplorer()=='ie11'){

              try {

                  var doc=document.getElementById(tableid);

                  //创建excel类型的Application

                  var exl= new ActiveXObject("Excel.Application");

                  //不显示界面

                  exl.visible=false;

                  var wbook=exl.Workbooks.Add();

                  var sheet=wbook.Worksheets(1);

                 //创建TextRange

                  var sel = document.body.createTextRange();

                  sel.moveToElementText(doc);

                  //选中数据

                 // sel.select();

                //模拟复制

                  sel.execCommand("Copy");

                  //模拟粘贴

                  sheet.Paste();

                //打开 excel界面

                  exl.Visible = true;

                 var fname = exl.GetSaveAsFilename("Excel.xls", "Excel Spreadsheets (*.xls), *.xls");

              } catch (e) {

                  dialogAlert("提示: 须允许ActiveX控件运行才能导出Excel文件!\n\n或<br>如果您确信您的电脑中已经安装了Excel，"+"那么请调整IE的安全级别。\n\n具体操作：\n\n"+"工具 → Internet选项 → 安全 → 自定义级别 → 对没有标记为安全的ActiveX进行初始化和脚本运行 → 启用",

                          '',function(){

                      var form=document.forms[0];

                      form.action=location.href+'?timestamp=' + new Date().getTime();

                      form.submit();

                      console.log(location.href);

                  });

                  return false;

              }

                  wbook.SaveAs(fname);

                  wbook.Close(false);

                  exl.Quit();

                  idTmr = window.setInterval("Cleanup()", 1);

         }else

          {

              tableToExcel(tableid)

          }  

      }

      function Cleanup() {

          window.clearInterval(idTmr);

          CollectGarbage();

      }

      var tableToExcel = (function() {

          var uri = 'data:application/vnd.ms-excel;base64,',

                  template = '<html><head><meta charset="UTF-8"></head><body><table>{table}</table></body></html>',

                  base64 = function(s) { return window.btoa(unescape(encodeURIComponent(s))) },

                  format = function(s, c) {

                      return s.replace(/{(\w+)}/g,

                              function(m, p) { return c[p]; }) }

          return function(table, name) {

              if (!table.nodeType) table = document.getElementById(table)

              var ctx = {worksheet: name || 'Worksheet', table: table.innerHTML}

              window.location.href = uri + base64(format(template, ctx))

          }

      })()