jsp页面导出excel

Question

function printExc(tableId) {
		    try {
		        var elTable = document.getElementById(tableId);
		        var oRangeRef = document.body.createTextRange();
		        oRangeRef.moveToElementText(elTable);
		        oRangeRef.execCommand("Copy");
		        var oXL = new ActiveXObject("Excel.Application");
		        var oWB = oXL.Workbooks.Add;
		        var oSheet = oWB.ActiveSheet;
		        oSheet.Paste();
		        //oSheet.Cells.NumberFormatLocal = "@";  //格式化数字时使用
		        //oSheet.Columns("D:D").Select;
		        //oXL.Selection.ColumnWidth = 10;
		        oXL.Selection.Columns.AutoFit;    //列宽自动适应
		        oXL.Selection.rowHeight = 22;  //行高
		        oXL.Visible = true;
		        oSheet = null;
		        oWB = null;
		        appExcel = null;
		    }
		    catch (e) {
		        alert(e.description);
		    }
		}

页面通过Js导出excel.页面table里显示的格式都是正确的，但是为什么导成excel之后格式就乱了？？
ps 是不是跟我用jquery合并的部分单元格有关系？？急！！