Javascript - Get A Textbox With Particular ValidationGroup In JQuery?

I have an ASP.NET TextBox ID="txtDate" in my usercontrol. It has ValidationGroup="MyUC" set. Now my UC is inside a Repeater Control. So there will be multiple instances of the same textbox. I am able to get all textboxes like: $("[id$='_txtDate']");

Each of the txtDate will have a separate ValidationGroup assigned to it, dynamically. So I want to get a textbox based on the id + ValidationGroup using jQuery / javascript.

Edited based on Josiah's Reply and the way I found:

my scenario is kind of complicated to include entire code. In short the textboxes are attached to jquery datepicker and the code below runs when a date is selected. The same handler is attached to multiple textboxes. Here is what I have:

var valgrp="MyGroup"; /*this mygroup is dynamic but keeping static for e.g.*/
var txtdate1 = $("[id$='txtDate']").filter(function(){if(this.Validators!=null){return this.Validators[0].validationGroup == valgrp;}});
var txtdate2 = $("[id$='txtDate']").filter(function(){return this.validationGroup == valgrp;});
alert("date1- " + txtdate1.val()); /*this returns date selected from datepicker*/
alert("date2 " + txtdate2.val()); /*this returns empty*/

Depending on the date I want to do something else. So txtdate1 is currently working for me where I don't have to add class to my textbox. I was playing with the txtdate2 which isn't behaving how I was expecting and so I had to post this question.

Here is a sample test to see this.validationGroup not returned:

$(function () {
$("#btntest").click(function () {
$("[id$='txtDate']").each(function () {
alert(this.validationGroup);//returns undefined
alert(this.Validators[0].validationGroup); //returns "test"
});
});
});
<input id="btntest" type="button" value="button" />
<asp:TextBox ID="txtDate" runat="server" ValidationGroup="test"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" Text="*" ErrorMessage="Required." ControlToValidate="txtDate" ValidationGroup="test"></asp:RequiredFieldValidator>