Why isn't my jQuery (or blur) event firing?

At the bottom of the jsfiddle here , I have this HTML:

<input type="text" id="BLAboxPaymentAmount" value="2">
</br>
<input type="text" id="BLAboxSection5Total" value="3">

      

        
        
        
      

    

.. and this jQuery:

$(document).on("focusout", '[id$=boxSection5Total]', function (e) {
    var totalvalue = $(this).val();
    //alert("boxSection5Total val is " + totalvalue);
    var paymenttotalvalue = $('[id$=boxPaymentAmount]').val();
    //alert("Payment Total val is " + paymenttotalvalue);
    if (totalvalue !== paymenttotalvalue) {
        alert("The value in 'Total' does not equal the previous value in 'Payment Total'");
    } else {
        alert("values ARE equal");
    }
});

      

        
        
        
      

    

It works fine in jsfiddle, but the event doesn't fire on my Sharepoint page - I enter a value in boxPaymentAmount ("5"), enter another in boxSection5Total ("6"), open the boxSection5Total field and I don't look at the warning as I should. based on this jQuery, which is almost identical to what in the jsfiddle:

$(document).on("focusout", '[id$=boxSection5Total]', function (e) {
    alert("focusout event has fired");
    var totalvalue = $(this).val();
    var paymenttotalvalue = $('[id$=boxPaymentAmount]').val();
    if (totalvalue !== paymenttotalvalue) {
        alert("The value in 'Total' does not equal the previous value in 'Payment Total'");
    }
});

      

        
        
        
      

    

So the event doesn't even get fired - why not?

I ran the page in Chrome and F12d looking for errors in the console but couldn't find it.

UPDATE

For A. (not "The") Wolff:

This is how I create elements in code:

boxPaymentAmount = new TextBox
{
    CssClass = "dplatypus-webform-field-input"
};

      

        
        
        
      

    

I also changed "textarea" to "text" in the HTML in the jsfiddle.

UPDATE 2

For Jonathen (not Russell) Crowe:

I changed my jQuery to the following:

$(document).on("blur", "[id$=boxSection5Total]", function (e) {
    alert("blur event has fired");
    console.log("blur event has fired");
    var totalvalue = $(this).val();
    var paymenttotalvalue = $('[id$=boxPaymentAmount]').val();
    if (totalvalue !== paymenttotalvalue) {
        alert("The value in 'Total' does not equal the previous value in 'Payment Total'");
        console.log("The value in 'Total' does NOT equal the previous value in 'Payment Total'");
    }
    else {
        console.log("The value in 'Total' DOES equal the previous value in 'Payment Total'");
    }
});

      

        
        
        
      

    

... and still don't see anything in the console from that event handler.

UPDATE 3

I have many other functions / handlers that work just fine; so why is it not a mystery. Perhaps if I show what I have (going back to some details) it can shed some light on what's going on (the fail function is last / at the bottom):

$(document).ready(function () {
    console.log('The ready function has been reached; Requester and Payee Status sections should be slid up'); /* This is a "sanity check" so it can be verified that this jQuery script is running/ran */
});

/* NOTE: Things that need to take place after all the elements have been constructed need to go here; the ready function can be too early */
$(window).load(function () {
    $('[id$=_AddressRows]').slideUp();
    $('[id$=panelSection2]').slideUp();
    $('[id$=panelSection3]').slideUp();

    $('[id$=ddlPayToVendor]').hide();
});

/* NOTE: this checkbox is only visible if they are not already authenticated; If they select "Yes" (self-identify as UCSC Faculty, Staff, or Student), prompt them to log in */
$(document).on("change", '[id$=ckbxUCSCFacultyStaffOrStudent]', function () {
    var ckd = this.checked;
    . . . code elided for brevity
});

/* If user selects "payment for self" (they are seeking payment for themselves, as opposed to someone else), omit (invisibilize) sections 2 and 3 on the form TODO: Should I change these from "change" to "click" */
$(document).on("click", '[id$=rbPaymentForSelf]', function () {
    if (this.checked) {
    . . . code elided for brevity
    }
});

/* If user selects "payment for someone else" (they are seeking payment for someone else, as opposed to themselves), make sections 2 and 3 on the form visible */
$(document).on("click", '[id$=rbPaymentForSomeoneElse]', function () {
    if (this.checked) {
    . . . code elided for brevity

    }
});

$(document).on("click", '[id$=rbPaymentToIndividual]', function () {
    if (this.checked) {
        $('[id$=ddlPayToVendor]').slideUp();
        $('[id$=ddlPayToIndividual]').slideDown();
    }
});

$(document).on("click", '[id$=rbPaymentToVendor]', function () {
    if (this.checked) {
        $('[id$=ddlPayToIndividual]').slideUp();
        $('[id$=ddlPayToVendor]').slideDown();
    }
});

// Refactor this to populate the elements below (description, account codes, tax 1099); may pull from Lists rather than use the hardcoded vals, but if need to do the latter, see http://jsfiddle.net/clayshannon/x8npcpss/3/
$(document).on("change", '[id$=ddlPayToIndividual]', function () {
    var value = $(this).val();
    . . . code elided for brevity

});

// Refactor this ... (see comment above)
$(document).on("change", '[id$=ddlPayToVendor]', function () {
    var value = $(this).val();
    . . . code elided for brevity

});

/* Disallow anything other than 0..9 in the "SSN or ITIN" textbox */
$(document).on("keypress", '[id$=txtbxSSNOrITIN]', function (e) {
    var k = e.which;
    if (k < 48 || k > 57) { e.preventDefault(); }
});

$(document).on("click", '[id$=btnAddFoapalRow]', function (e) {
    var textboxHeight = 15;
    . . . code elided for brevity

});

$(document).on("keyup", "[id$=explainPaymentTextBox]", function (e) {
    console.log("explainPaymentTextBox keyup reached");
    while ($(this).outerHeight() < this.scrollHeight + parseFloat($(this).css("borderTopWidth")) + parseFloat($(this).css("borderBottomWidth"))) {
        $(this).height($(this).height() + 1);
    };
});

HERE IS THE RECALCITRANT ONE (DOESN'T FIRE):
/* Verify that amount in "Total" equals amount in Section 1 "Payment Amount"; this is not working at present; I first tried "focusout" instead of "blur" but neither event fires... */
$(document).on("blur", "[id$=boxSection5Total]", function (e) {
    alert("boxSection5Total blur event has fired");
    console.log("boxSection5Total blur event has fired");
    var totalvalue = $(this).val();
    var paymenttotalvalue = $('[id$=boxPaymentAmount]').val();
    if (totalvalue !== paymenttotalvalue) {
        alert("The value in 'Total' does not equal the previous value in 'Payment Total'");
        console.log("The value in 'Total' does NOT equal the previous value in 'Payment Total'");
    }
    else {
        console.log("The value in 'Total' DOES equal the previous value in 'Payment Total'");
    }
});