jQuery not working in ASP.Net

jquery date picker is not working

<script language="javascript" type="text/javascript" src="Js/Global.js"></script>
<script type="text/javascript" language="javascript" src="Js/jquery-ui-1.10.4.custom.js"></script>
<script type="text/javascript" language="javascript" src="Js/jquery-ui-1.10.4.custom.min.js"></script>
<script type="text/javascript" language="javascript" src="Js/jquery.ui.datepicker.js"></script>
<script type="text/javascript" language="javascript">

$(function() {
    $( "#ctl00_ContentPlaceHolder2_txtFromDate" ).datepicker();
    $( "#ctl00_ContentPlaceHolder2_txtToDate" ).datepicker();
  });

<tr>
    <td style="padding-top: 5px;">
        <h1 style="font-size: 15px;" id="h1_16" runat="server">
            From Date</h1>
    </td>
</tr>
<tr>
    <td style="padding-top: 8px;" class="taborder">
        <asp:TextBox runat="server" Style="width: 170px; border-style: none;" ID="txtFromDate"
            ReadOnly="true"></asp:TextBox>
        &nbsp;
    </td>
</tr>
<tr>
    <td style="padding-top: 5px;">
        <h1 style="font-size: 15px;" id="h1_17" runat="server">
            To Date</h1>
    </td>
</tr>
<tr>
    <td style="padding-top: 8px;" class="taborder">
        <asp:TextBox runat="server" Style="width: 170px; border-style: none;" ID="txtToDate"
            ReadOnly="true"></asp:TextBox>
    </td>
</tr>