怎么用JS把页面上几张table导到同一个excel文件的不同sheet里？

下面代码现在不能导到不同的sheet里，只能创建几个空sheet，请问我该怎么改呢？

var tablesToExcel = (function () {
    var uri = 'data:application/vnd.ms-excel;base64,'
    , template = '<html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:x="urn:schemas-microsoft-com:office:excel" xmlns="http://www.w3.org/TR/REC-html40"><head><!--[if gte mso 9]><xml><x:ExcelWorkbook><x:ExcelWorksheets>'
    , templateend = '</x:ExcelWorksheets></x:ExcelWorkbook></xml><![endif]--></head>'
    , body = '<body>'
    , tablevar = '<table>{table'
    , tablevarend = '}</table>'
    , bodyend = '</body></html>'
    , worksheet = '<x:ExcelWorksheet><x:Name>'
    , worksheetend = '</x:Name><x:WorksheetOptions><x:DisplayGridlines/></x:WorksheetOptions></x:ExcelWorksheet>'
    , worksheetvar = '{worksheet'
    , worksheetvarend = '}'
    , base64 = function (s) { return window.btoa(unescape(encodeURIComponent(s))) }
    , format = function (s, c) { return s.replace(/{(\w+)}/g, function (m, p) { return c[p]; }) }
    , wstemplate = ''
    , tabletemplate = '';

    return function (table, name, filename) {
        var tables = table;

        for (var i = 0; i < tables.length; ++i) {
            wstemplate += worksheet + worksheetvar + i + worksheetvarend + worksheetend;
            tabletemplate += tablevar + i + tablevarend;
        }

        var allTemplate = template + wstemplate + templateend;
        var allWorksheet = body + tabletemplate + bodyend;
        var allOfIt = allTemplate + allWorksheet;

        var ctx = {};
        for (var j = 0; j < tables.length; ++j) {
            ctx['worksheet' + j] = name[j];
        }

        for (var k = 0; k < tables.length; ++k) {
            var exceltable;
            if (!tables[k].nodeType) exceltable = document.getElementById(tables[k]);
            ctx['table' + k] = exceltable.innerHTML;
        }

        //document.getElementById("dlink").href = uri + base64(format(template, ctx));
        //document.getElementById("dlink").download = filename;
        //document.getElementById("dlink").click();

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

    }
})();

, worksheetend = '</x:Name><x:WorksheetOptions><x:DisplayGridlines/></x:WorksheetOptions></x:ExcelWorksheet>'
, worksheetvar = '{worksheet'
, worksheetvarend = '}'

这几行是控制你输出的worksheet的，你稍微修改下就可以了。