JavaScript导出excel文件实现

 function getXlsFromTbl(inTblId, inWindow, fname) {
     try {
         var allStr = "";
         var curStr = "";
         // alert("getXlsFromTbl");
         if (inTblId != null && inTblId != "" && inTblId != "null") {
             curStr = getTblData(inTblId, inWindow);
         }
         // alert("curStr="+curStr);
         if (curStr != null) {
             allStr += curStr;
         } else {
             alert("你要导出的表格不存在！");
             return;
         }
         var fileName = getExcelFileName(fname);
         doFileExport(fileName, allStr);
     } catch (e) {
         alert("导出发生异常:" + e.name + "->" + e.description + "!");
     }
 }
 function getTblData(inTbl, inWindow) {
     var rows = 0;
     // alert("getTblData is " + inTbl + "==" + inWindow);
     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++) {
             // alert("j is " + j);
             for (var i = 0; i < curTbl.rows[j].cells.length; i++) {
                 // alert("i is " + i);
                 if (i == 0 && rows > 0) {
                     outStr += " \t";
                     rows -= 1;
                 }
                 outStr += curTbl.rows[j].cells[i].innerText + "\t";
                 // alert();
                 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;
                     }
                 }
             }
             if (j == 0)
                 outStr = replaceAll(outStr, "\r\n", ""); //替换掉回车换行
             outStr += "\r\n";
             // alert(outStr);
         }
     } else {
         outStr = null;
         alert(inTbl + "不存在!");
     }
     return outStr;
 }
 function getExcelFileName(fname) {
     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 = fname + "_" + curYear + curMonth + curDate + "_" + curHour
             + curMinute + curSecond + ".csv.html";
     // alert(fileName);
     return fileName;
 }
 function doFileExport(inName, inStr) {
     var xlsWin = null;
     if (!!document.all("glbHideFrm")) {
         xlsWin = glbHideFrm;
     } else {
         var width = 5;
         var height = 5;
         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();
 }

 function replaceAll(ss, s, r) {
     var rs = ss;
     // alert(rs+"="+r);
     // alert(rs.indexOf(s));
     while (rs.indexOf(s) != -1) {
         // alert("A="+rs);
         rs = rs.replace(s, r);
         // alert("B="+rs);
     }
     return rs;
 }