add error message to the current Validation Summary

I have a collection of textbox that created dynamically (through button click), and all the textbox are required. An error message should be added to the current validation summary once the textbox is empty.Any help on how to do this one.

Javascript Code

var rowsid = 0;
    // Add button functionality
    $("#btnAddButton").live("click", function () {
        var master = $(this).parents().find("table.dynamictable"); //$(this).parents("table.dynatable");

        // Get a new row based on the prototype row
        var prot = master.find(".prototype").clone();
        prot.attr("class", "");
        prot.find(".id").attr("value", "00000" + rowsid);


<div class="msg-body">
        <table class="dynamictable">
                    <th style="display: none"></th>
                    <th>Package Name</th>
                    <th>Package Cost</th>
                    <th>No. of Attendees</th>
                <tr class="prototype">
                    <td style="display: none"><input type="hidden" name="id[]" value="" class="id" /></td>
                    <td><input type="text" name="packagename[]" value="" class="pkname" data-val-required="This field is required"  /></td>
                    <td><input type="text" name="packagecost[]" value="0" class="pkcost" style="text-align: right" /></td>
                    <td><input type="text" name="noofattendees[]" value="0" class="nfattendees" style="text-align: right"/></td>
                    <td>@Html.ActionImage("", null, "~/Content/Images/delete.gif", "Delete", new { @class = "deleterows" }) </td>
        <div style="padding:20px 0 20px 100px "><input type="button" id="btnAddButton" value="Add New" class="button addbutton"/></div>


function refreshValidation() {

This will revalidate texboxes that you added dynamically

Use HTML5 required="required" attribute, but it won't work in old versions of IE

<input type="text" name="usrname" required="required" />

Detailed explanation -

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