TableToExcel.prototype.setTextAlign = function (textAlign) {
this.textAlign = textAlign;
};

TableToExcel.prototype.isAutoFit = function (autoFit) {
if (autoFit == true || autoFit == false)
this.autoFit = autoFit;
}
//文件转换主函数
TableToExcel.prototype.getExcelFile = function () {
var jXls, myWorkbook, myWorksheet, myHTMLTableCell, myExcelCell, myExcelCell2;
var myCellColSpan, myCellRowSpan;

try {
jXls = new ActiveXObject('Excel.Application');
}
catch (e) {
alert("无法启动Excel!\n\n" + e.message +
"\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;
}

jXls.Visible = true;
myWorkbook = jXls.Workbooks.Add();
jXls.DisplayAlerts = false;
myWorkbook.Worksheets(3).Delete();
myWorkbook.Worksheets(2).Delete();
jXls.DisplayAlerts = true;
myWorksheet = myWorkbook.ActiveSheet;

var readRow = 0, readCol = 0;
var totalRow = 0, totalCol = 0;
var tabNum = 0;

//设置行高、列宽
if (this.columnWidth != -1)
myWorksheet.Columns.ColumnWidth = this.columnWidth;
else
myWorksheet.Columns.ColumnWidth = 7;
if (this.rowHeight != -1)
myWorksheet.Rows.RowHeight = this.rowHeight;

//搜索需要转换的Table对象，获取对应行、列数
var obj = document.all.tags("table");
for (x = 0; x < obj.length; x++) {
if (obj[x].id == this.tableID) {
tabNum = x;
totalRow = obj[x].rows.length;
for (i = 0; i < obj[x].rows[0].cells.length; i++) {
myHTMLTableCell = obj[x].rows(0).cells(i);
myCellColSpan = myHTMLTableCell.colSpan;
totalCol = totalCol + myCellColSpan;
}
}
}

//开始构件模拟表格
var excelTable = new Array();
for (i = 0; i <= totalRow; i++) {
excelTable[i] = new Array();
for (t = 0; t <= totalCol; t++) {
excelTable[i][t] = false;
}
}

//开始转换表格
for (z = 0; z < obj[tabNum].rows.length; z++) {
readRow = z + 1;
readCol = 0;
for (c = 0; c < obj[tabNum].rows(z).cells.length; c++) {
myHTMLTableCell = obj[tabNum].rows(z).cells(c);
myCellColSpan = myHTMLTableCell.colSpan;
myCellRowSpan = myHTMLTableCell.rowSpan;
for (y = 1; y <= totalCol; y++) {
if (excelTable[readRow][y] == false) {
readCol = y;
break;
}
}
if (myCellColSpan * myCellRowSpan > 1) {
myExcelCell = myWorksheet.Cells(readRow, readCol);
myExcelCell2 = myWorksheet.Cells(readRow + myCellRowSpan - 1, readCol + myCellColSpan - 1);
myWorksheet.Range(myExcelCell, myExcelCell2).Merge();
myExcelCell.HorizontalAlignment = this.textAlign;
myExcelCell.Font.Size = this.fontSize;
myExcelCell.Font.Name = this.fontStyle;
myExcelCell.wrapText = this.lineWrap;
myExcelCell.Interior.ColorIndex = this.backGround;
myExcelCell.Font.ColorIndex = this.fontColor;
if (this.tableBorder != -1) {
myWorksheet.Range(myExcelCell, myExcelCell2).Borders(1).Weight = this.tableBorder;
myWorksheet.Range(myExcelCell, myExcelCell2).Borders(2).Weight = this.tableBorder;
myWorksheet.Range(myExcelCell, myExcelCell2).Borders(3).Weight = this.tableBorder;
myWorksheet.Range(myExcelCell, myExcelCell2).Borders(4).Weight = this.tableBorder;
}

myExcelCell.Value = myHTMLTableCell.innerText;
for (row = readRow; row <= myCellRowSpan + readRow - 1; row++) {
for (col = readCol; col <= myCellColSpan + readCol - 1; col++) {
excelTable[row][col] = true;
}
}