javascript 将 table 导出 Excel ,可跨行跨列

<script language="JavaScript" type="text/javascript">
        //jQuery HTML导出Excel文件(兼容IE及所有浏览器)
        function HtmlExportToExcel(tableid,file_name) {
            var filename =file_name; //'Book'
            if (getExplorer() == 'ie' || getExplorer() == undefined) {
                HtmlExportToExcelForIE(tableid, filename);
            }
            else {
                HtmlExportToExcelForEntire(tableid, filename)
            }
        }
        //IE浏览器导出Excel
        function HtmlExportToExcelForIE(tableid, filename) {
            try {             
                var curTbl = document.getElementById(tableid);  
                var oXL;  
                try{  
                    oXL = new ActiveXObject("Excel.Application"); //创建AX对象excel  
                }catch(e){  
                    alert("无法启动Excel!\n\n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");  
                    return false;  
                }  
                var oWB = oXL.Workbooks.Add(); //获取workbook对象  
                var oSheet = oWB.ActiveSheet;//激活当前sheet  
                var sel = document.body.createTextRange();  
                sel.moveToElementText(curTbl); //把表格中的内容移到TextRange中  
                try{
                    sel.select(); //全选TextRange中内容  
                }catch(e1){
                    e1.description
                }
                sel.execCommand("Copy");//复制TextRange中内容  
                oSheet.Paste();//粘贴到活动的EXCEL中  
                oXL.Visible = true; //设置excel可见属性  
                var fname = oXL.Application.GetSaveAsFilename(filename+".xls", "Excel Spreadsheets (*.xls), *.xls");  
                oWB.SaveAs(fname);  
                oWB.Close();  
                oXL.Quit(); 
 
            } catch (e) {
                alert(e.description);
            }
        }
         
        //非IE浏览器导出Excel
        var HtmlExportToExcelForEntire = (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><x:ExcelWorksheet><x:Name>{worksheet}</x:Name><x:WorksheetOptions><x:DisplayGridlines/></x:WorksheetOptions></x:ExcelWorksheet></x:ExcelWorksheets></x:ExcelWorkbook></xml><![endif]--></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 }
                document.getElementById("dlink").href = uri + base64(format(template, ctx));
                document.getElementById("dlink").download = name + ".xls";
                document.getElementById("dlink").click();
            }
        })()
         
        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';
            }
        }
</script>

//调用
function ToExcel(){
      
     HtmlExportToExcel('table_main','Book'); 
}
 
//html部分   table_main为table的id
<table  id="table_main"    > 
 
</table>