This time i have done this differently. Please refer it.
HTML:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="CS.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 id="Head1" runat="server">
<title></title>
<script src="http://code.jquery.com/jquery-1.8.3.min.js" type="text/javascript"></script>
<script type="text/javascript">
$("[id*=textbox1]").live("change", function () {
debugger;
var validTime = $(this).val().match(/^(0?[1-9]|1[012])(:[0-5]\d) [APap][mM]$/);
if (!validTime) {
$(this).val('').focus().css('background', '#fdd');
} else {
$(this).css('background', 'transparent');
}
});
</script>
<script type="text/javascript">
function GetDynamicTextBox(value) {
return '<input name = "DynamicTextBox" id="textbox1" type="text" value = "' + value + '" />' +
'<input type="button" value="Remove" onclick = "RemoveTextBox(this)" />'
}
function AddTextBox() {
var div = document.createElement('DIV');
div.innerHTML = GetDynamicTextBox("");
document.getElementById("TextBoxContainer").appendChild(div);
}
function RemoveTextBox(div) {
document.getElementById("TextBoxContainer").removeChild(div.parentNode);
}
function RecreateDynamicTextboxes() {
var values = eval('<%=Values%>');
if (values != null) {
var html = "";
for (var i = 0; i < values.length; i++) {
html += "<div>" + GetDynamicTextBox(values[i]) + "</div>";
}
document.getElementById("TextBoxContainer").innerHTML = html;
}
}
window.onload = RecreateDynamicTextboxes;
</script>
</head>
<body>
<form id="form1" runat="server">
<input id="btnAdd" type="button" value="add" onclick="AddTextBox()" />
<br />
<br />
<div id="TextBoxContainer">
<!--Textboxes will be added here -->
</div>
<br />
<asp:Button ID="btnPost" runat="server" Text="Post" OnClick="Post" />
<asp:Label ID="lblMesg" Text="" runat="server" />
</form>
</body>
</html>
output:

If the Time is not in proper format then TextBox color will become red.
Thank you.