js把页面的table标签导出为csv

function saveCode(tableid, title) {
 var winname;
 try {
 if (navigator.userAgent.indexOf("MSIE") > 0) //IE浏览器 
 {
 var strHTML = $("#" + tableid).parent().html();
 //alert("IE浏览器");
 winname = window.open("ToExcel", "_blank", 'top=10000'); 

 winname.document.open('text/html', 'replace');
 winname.document.write("<style>");
 winname.document.write("table{border:solid 1px #000;text-align:center;border-collapse:collapse; border-spacing:0;}");
 winname.document.write("table td{border:solid 1px #000;text-align:center;}");
 winname.document.write("table th{border:solid 1px #000;text-align:center;}");
 winname.document.write("</style>");
 winname.document.write(strHTML);
 winname.document.execCommand('SaveAs', '', title + '.xls');
 document.execCommand("ClearAuthenticationCache");
 winname.close();
 }
 else if (isFirefox = navigator.userAgent.indexOf("Firefox") > 0) //Firefox 
 {
 //alert("Firefox"); 
 var str = getTblDataByFirefox(tableid, this);
 //支持中文
 var uri = 'data:text/csv;charset=utf-8,\ufeff' + encodeURIComponent(str);
 var downloadLink = document.createElement("a");
 downloadLink.href = uri;
 downloadLink.download = title + ".csv";

 document.body.appendChild(downloadLink);
 downloadLink.click();
 document.body.removeChild(downloadLink);

 }
 else //Google Chrome
 {
 //alert("Google Chrome等浏览器");
 var str = getTblData(tableid, this); 
 
 //支持中文
 var uri = 'data:text/csv;charset=utf-8,\ufeff' + encodeURIComponent(str);

 var downloadLink = document.createElement("a");
 downloadLink.href = uri;
 downloadLink.download = title + ".csv";

 document.body.appendChild(downloadLink);
 downloadLink.click();
 document.body.removeChild(downloadLink);
 }
 } catch (e) {
 alert(e.Message);
 return false;
 }
 return false;
}



function getTblData(inTbl, inWindow) {

 var rows = 0;
 var tblDocument = document;

 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 += ",";
 rows -= 1;
 }

 outStr +=curTbl.rows[j].cells[i].innerText + ",";
 if (curTbl.rows[j].cells[i].colSpan > 1) {
 for (var k = 0; k < curTbl.rows[j].cells[i].colSpan - 1; k++) {
 outStr += ",";
 }
 }
 if (i == 0) {
 if (rows == 0 && curTbl.rows[j].cells[i].rowSpan > 1) {
 rows = curTbl.rows[j].cells[i].rowSpan - 1;
 }
 }
 }
 outStr += "\r\n";//换行
 }
 }

 else {
 outStr = null;
 alert(allPage.noData);
 }
 return outStr;
}