日历控件My97DatePicker

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>无标题页</title>
       <script  src="My97DatePicker/WdatePicker.js" type="text/javascript"></script>
</head>
<body>
    <form id="form1" runat="server">
    <div>
<asp:TextBox ID="txtStartTime" onfocus="WdatePicker()"   runat="server"></asp:TextBox>
    </div>
    </form>
</body>
<html>
为什么没反应？？求解！我是在aspx上引得，My97DatePicker在根目录！