纯JS将table表格导出到excel的方法

<div >
    <button type="button" onclick="getxlsfromtbl('tableexcel','mydiv')">ie导出excel方法</button>
    <button type="button" onclick="method5('tableexcel')">chrome导出excel</button>
</div>
<div id="mydiv">
    <table id="tableexcel" width="100%" border="1" cellspacing="0" cellpadding="0">
        <tr>
            <td colspan="5" align="center">html 表格导出到excel</td>
        </tr>
        <tr>
            <td>列标题1</td>
            <td>列标题2</td>
            <td>类标题3</td>
            <td>列标题4</td>
            <td>列标题5</td>
        </tr>
        <tr>
            <td>aaa</td>
            <td>bbb</td>
            <td>ccc</td>
            <td>ddd</td>
            <td>eee</td>
        </tr>
        <tr>
            <td>aaa</td>
            <td>bbb</td>
            <td>ccc</td>
            <td>ddd</td>
            <td>eee</td>
        </tr>
        <tr>
            <td>fff</td>
            <td>ggg</td>
            <td>hhh</td>
            <td>iii</td>
            <td>jjj</td>
        </tr>
    </table>
</div>

<script language="javascript" type="text/javascript">
        //ie方法
        function getxlsfromtbl(intblid, inwindow){

            try {
                var allstr = "";
                var curstr = "";
                if (intblid != null && intblid != "" && intblid != "null") {

                    curstr = gettbldata(intblid, inwindow);

                }
                if (curstr != null) {
                    allstr += curstr;
                }

                else {

                    alert("你要导出的表不存在");
                    return;
                }
                var filename = getexcelfilename();
                dofileexport(filename, allstr);

            }

            catch(e) {

                alert("导出发生异常:" + e.name + "->" + e.description + "!");

            }

        }
        function gettbldata(intbl, inwindow) {

            var rows = 0;
            var tbldocument = document;
            if (!!inwindow && inwindow != "") {

                if (!document.all(inwindow)) {
                    return null;
                }

                else {
                    tbldocument = eval(inwindow).document;
                }

            }

            var curtbl = tbldocument.getelementbyid(intbl);
            var outstr = "";
            if (curtbl != null) {
                for (var j = 0; j < curtbl.rows.length; j++) {
                    for (var i = 0; i < curtbl.rows[j].cells.length; i++) {

                        if (i == 0 && rows > 0) {
                            outstr += " t";
                            rows -= 1;
                        }

                        outstr += curtbl.rows[j].cells[i].innertext + "t";
                        if (curtbl.rows[j].cells[i].colspan > 1) {
                            for (var k = 0; k < curtbl.rows[j].cells[i].colspan - 1; k++) {
                                outstr += " t";
                            }
                        }
                        if (i == 0) {
                            if (rows == 0 && curtbl.rows[j].cells[i].rowspan > 1) {
                                rows = curtbl.rows[j].cells[i].rowspan - 1;
                            }
                        }
                    }
                    outstr += "rn";
                }
            }

            else {
                outstr = null;
                alert(intbl + "不存在 !");
            }
            return outstr;
        }
        function getexcelfilename() {
            var d = new date();
            var curyear = d.getyear();
            var curmonth = "" + (d.getmonth() + 1);
            var curdate = "" + d.getdate();
            var curhour = "" + d.gethours();
            var curminute = "" + d.getminutes();
            var cursecond = "" + d.getseconds();
            if (curmonth.length == 1) {
                curmonth = "0" + curmonth;
            }

            if (curdate.length == 1) {
                curdate = "0" + curdate;
            }

            if (curhour.length == 1) {
                curhour = "0" + curhour;
            }

            if (curminute.length == 1) {
                curminute = "0" + curminute;
            }

            if (cursecond.length == 1) {
                cursecond = "0" + cursecond;
            }
            var filename = "table" + "_" + curyear + curmonth + curdate + "_"
                    + curhour + curminute + cursecond + ".csv";
            return filename;

        }
        function dofileexport(inname, instr) {
            var xlswin = null;
            if (!!document.all("glbhidefrm")) {
                xlswin = glbhidefrm;
            }
            else {
                var width = 6;
                var height = 4;
                var openpara = "left=" + (window.screen.width / 2 - width / 2)
                        + ",top=" + (window.screen.height / 2 - height / 2)
                        + ",scrollbars=no,width=" + width + ",height=" + height;
                xlswin = window.open("", "_blank", openpara);
            }
            xlswin.document.write(instr);
            xlswin.document.close();
            xlswin.document.execcommand('saveas', true, inname);
            xlswin.close();

        }

        //chrome方法
        var idtmr;
        function  getexplorer() {
            var explorer = window.navigator.useragent ;
            //ie  
            if (explorer.indexof("msie") >= 0) {
                return 'ie';
            }
            //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 method5(tableid) {
            if(getexplorer()=='ie')
            {
                var curtbl = document.getelementbyid(tableid);
                var oxl = new activexobject("excel.application");
                var owb = oxl.workbooks.add();
                var xlsheet = owb.worksheets(1);
                var sel = document.body.createtextrange();
                sel.movetoelementtext(curtbl);
                sel.select();
                sel.execcommand("copy");
                xlsheet.paste();
                oxl.visible = true;

                try {
                    var fname = oxl.application.getsaveasfilename("excel.xls", "excel spreadsheets (*.xls), *.xls");
                } catch (e) {
                    print("nested catch caught " + e);
                } finally {
                    owb.saveas(fname);
                    owb.close(savechanges = false);
                    oxl.quit();
                    oxl = null;
                    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))
            }
        })()

    </script>