用JavaScript完成Excel数据导入

有些时候我们的站点提供给客户数据导入导出功能，通常选择媒介格式为xls，下面是用JavaScript完成对客户端xls数据的载入：

<html>
<head>
 <title>Untitled</title>
 <script>
function importXLS(fileName)
{  
 objCon = new ActiveXObject("ADODB.Connection");
 objCon.Provider = "Microsoft.Jet.OLEDB.4.0";
 objCon.ConnectionString = "Data Source=" + fileName + ";Extended Properties=Excel 8.0;";
 objCon.CursorLocation = 1;
 objCon.Open;
 var strQuery;
 //Get the SheetName
 var strSheetName = "Sheet1$";
 var rsTemp =  new ActiveXObject("ADODB.Recordset");
 rsTemp = objCon.OpenSchema(20);
 if(!rsTemp.EOF)
  strSheetName = rsTemp.Fields("Table_Name").Value;
  
 rsTemp = null
 
 rsExcel =  new ActiveXObject("ADODB.Recordset");
 strQuery = "SELECT * FROM [" + strSheetName + "]";
 rsExcel.ActiveConnection = objCon;
 rsExcel.Open(strQuery);
 while(!rsExcel.EOF)
 {
  for(i = 0;i<rsExcel.Fields.Count;++i)
  {
   alert(rsExcel.Fields(i).value);
  }
  rsExcel.MoveNext; 
 }
 
 // Close the connection and dispose the file
 objCon.Close;
 objCon =null;
 rsExcel = null;
}
 </script>
</head>
<body>
<input type=file id=f>
<input type=button id=b value="import" onclick="if(f.value=='')alert('请选择xls文件');else importXLS(f.value)">
</body>
</html>