trouble in getting dynamic id`s for datepicker - asp.net

Question

i want to generate a dynamic id of my datepicker. below jquery function shows the datetimepicker as the id is defined as static.
$(function () {
var dates = $("#ContentPlaceHolder1_gvdLCStatus_txtInvoiceDate_0").datepicker(
{
dateFormat: 'dd/mm/yy',
defaultDate: '+1w',
changeMonth: false,
numberOfMonths: 1,
showOn: 'both',
buttonImage: 'Images/calendar_month.png',
buttonImageOnly: true,
onSelect: function (selectedDate) {
var option = this.id == "ContentPlaceHolder1_gvdLCStatus_txtInvoiceDate_0" ? "minDate" : "maxDate",
instance = $(this).data("datepicker");
date = $.datepicker.parseDate(
instance.settings.dateFormat ||
$.datepicker._defaults.dateFormat,
selectedDate, instance.settings);
dates.not(this).datepicker("option", option, date);
}
});
});
I want to generate a dynamic ID for the DatePicker. and How that ive tried various time but couldnt find the actual way of doing.Thanks.
<asp:GridView ID="gvdLCStatus" runat="server" DataKeyNames="LCID" AutoGenerateColumns="false"
AllowPaging="True" PageSize="4" EmptyDataText="No Record Found" CssClass="mGrid"
OnPageIndexChanging="gvdLCStatus_PageIndexChanging" OnRowCommand="gvdLCStatus_RowCommand"
OnSelectedIndexChanged="gvdLCStatus_SelectedIndexChanged" OnRowDataBound="gvdLCStatus_RowDataBound"
OnRowCreated="gvdLCStatus_RowCreated">
<AlternatingRowStyle CssClass="test" />
<Columns>
<asp:TemplateField HeaderText="LC Number">
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%# Eval("LCID") %>' Visible="false"></asp:Label>
<a href="#" onclick="linkbtnTest('<%# "#"+Eval("LCNumber") %>')">
<%# Eval("LCNumber") %></a>
<%-- <div id='<%# Eval("ShipmentID") %>' style="display: none;">
</div>--%>
<div id='<%# Eval("LCNumber") %>' style="display: none;">
<asp:GridView ID="gvShipmentStatus" runat="server" AutoGenerateColumns="false" DataKeyNames="ShipmentID"
OnRowCommand="gvShipmentStatus_RowCommand" OnRowDataBound="gvShipmentStatus_RowDataBound"
CssClass="mGrid">
<Columns>
<asp:BoundField DataField="InvoiceNumber" HeaderText="Invoice Number" />
<asp:BoundField DataField="InvoiceDate" HeaderText="Invoice Date" />
<asp:BoundField DataField="BLNumber" HeaderText="B/L Number" />
<asp:BoundField DataField="BLDate" HeaderText="B/L Date" />
<asp:BoundField DataField="VesselName" HeaderText="Vessel Name" />
<asp:BoundField DataField="VoyageNumber" HeaderText="Voyage Number" />
<asp:BoundField DataField="DueDate" HeaderText="Due Date" />
<asp:BoundField DataField="ContractedShipmentSchedule" HeaderText="Shipment Schedule" />
<asp:TemplateField HeaderText="Delete">
<ItemTemplate>
<asp:ImageButton ID="ImgShipmentDelete" runat="server" ImageUrl='<%# isDelete_img(Session["isAdmin"].ToString()) %>'
Enabled='<%# isDelete(Session["isAdmin"].ToString()) %>' CommandName="DeleteShipmentRecord"
CommandArgument='<%# Eval("ShipmentID") %>' AlternateText="DeleteShipmentRecord"
OnClientClick="return confirm_delete();" Style='<%# delete_style(Session["isAdmin"].ToString()) %>' />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Edit">
<ItemTemplate>
<%-- <asp:ImageButton ID="ImgShipmentEdit" runat="server" ImageUrl="~/Images/edit.png"
CommandName="EditShipmentRecord" ImageAlign="Middle" CommandArgument='<%# Eval("ShipmentID") %>'
AlternateText="EditShipmentRecord" OnClientClick='linkbtnTest(<%# Eval("ShipmentID) %>)' />
--%>
<asp:LinkButton ID="LinkButton1" runat="server" CommandName="EditShipmentRecord"
CommandArgument='<%# Eval("ShipmentID")+":"+Eval("LCStatusID")%>'>
<%--<asp:Label ID="Label2" runat="server" Text='<%# Eval("ShipmentID") %>' Visible="true"></asp:Label>--%> <img src="Images/edit.png" alt="Edit" />
</asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
</div>
<%--</div>--%>
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="ContractNumber" HeaderText="Contract Number" />
<asp:BoundField DataField="Amount" HeaderText="Amount" />
<asp:BoundField DataField="Qty" HeaderText="Quantity" />
<asp:TemplateField>
<ItemTemplate>
Add Shipment Status
<div id='<%# Eval("LCID") %>' style="display: none;">
<table>
<tr>
<td class="td_records" style="padding-top: 5px;">
Invoice Number
</td>
<td class="td_records" style="padding-top: 5px;">
Invoice Date (dd/mm/yyyy)
</td>
<td class="td_records" style="padding-top: 5px;">
B/L Number
</td>
<td class="td_records" style="padding-top: 5px;">
B/L Date (dd/mm/yyyy)
</td>
</tr>
<tr>
<td>
<asp:TextBox ID="txtInvoiceNumber" runat="server"></asp:TextBox>
</td>
<td>
<asp:TextBox ID="txtInvoiceDate" runat="server"></asp:TextBox>
</td>
<td>
<asp:TextBox ID="txtBLNumber" runat="server"></asp:TextBox>
</td>
<td>
<asp:TextBox ID="txtBLDate" runat="server"></asp:TextBox>
</td>
</tr>
<tr>
<td class="td_records" style="padding-top: 5px;">
VesselName
</td>
<td class="td_records" style="padding-top: 5px;">
VoyageNumber
</td>
<td class="td_records" style="padding-top: 5px;">
DueDate (dd/mm/yyyy)
</td>
<td class="td_records" style="padding-top: 5px;">
ShipmntSchedule (dd/mm/yyyy)
</td>
</tr>
<tr>
<td>
<asp:TextBox ID="txtVesselName" runat="server"></asp:TextBox>
</td>
<td>
<asp:TextBox ID="txtVoyageNumber" runat="server"></asp:TextBox>
</td>
<td>
<asp:TextBox ID="txtDueDate" runat="server"></asp:TextBox>
</td>
<td>
<asp:TextBox ID="txtShipmntSchedule" runat="server"></asp:TextBox>
</td>
</tr>
<tr>
<td style="padding-top: 10px;">
<asp:Button ID="btnSubmitShipment" runat="server" Text="Submit" CommandName="Select"
OnCommand="btnSubmitShipment_Command" CssClass="btnSubmitCSS" />
<asp:Button ID="btnResetShipmentRecord" runat="server" Text="Reset" CssClass="btnSubmitCSS" />
</td>
</tr>
</table>
</div>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField>
<ItemTemplate>
<asp:ImageButton ID="imgDelete" runat="server" ImageUrl='<%# isDelete_img(Session["isAdmin"].ToString()) %>'
Enabled='<%# isDelete(Session["isAdmin"].ToString()) %>' CommandName="DeleteRecord"
CommandArgument='<%# Eval("LCID") %>' AlternateText="DeleteRecord" OnClientClick="return confirm_delete();"
Style='<%# delete_style(Session["isAdmin"].ToString()) %>' />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField>
<ItemTemplate>
<asp:ImageButton ID="imgEdit" runat="server" ImageUrl="~/Images/edit.png" CommandName="EditRecord"
CommandArgument='<%# Eval("LCID") %>' AlternateText="EditRecord" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
<PagerStyle CssClass="pgr" />
</asp:GridView>

Answer 1

As an option you may use such selector:
var dates = $("[id*='txtInvoiceDate']", "#<%= gvdLCStatus.ClientID %>")​
But better consider to set CssClass property on textboxes and use class selector

Answer 2

Why do you select by id? Why don't you go with class name? $('.datebox').dateTimepicker(...

Answer 3

i found an alternate of validating it with asp.net required field validators. No other option was there and had to maintain the time constraint.
Thanks Guys.