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Delete dynamically created rows with jquery and bind / update cash totals

Not able to delete rows created dynamically. .add-row will create the dynamic row but the .delete will not remove it. the initial .item-row will however execute the click event and remove that row.
the click event never seems to fire on the added rows?
<form action="insert.php" id="testinsert" method="POST">
<input type="submit" value="Submit" />
</form>
<!--div class="font-effect-shadow-multiple">This is a font effect!<div-->
<div id="page-wrap">
<textarea id="header">INVOICE</textarea>
<div id="identity">
<div form ="testinsert" name="business-address" id="business-address">
<span id="cmtext">Fix it Guy </span><br>
43150 Your Drive<br>
Potomac City, MD 20901<br>
Phone: (301) 555-5580</div>
<div id="logo">
<div id="logoctr">
Change Logo
Save
|
Delete Logo
Cancel
</div>
<div id="logohelp">
<input id="imageloc" type="text" size="50" value="" /><br />
(max width: 540px, max height: 100px)
</div>
<img id="image" src="images/CM_LOGO.JPG" alt="logo" />
</div>
</div>
<div style="clear:both"></div>
<div id="customer">
<div class="container">
<div class="space"></div>
<!--
<textarea form ="testinsert" name="customer" id="customer-title">Customer Name</textarea>
-->
<textarea form ="testinsert" name="address" id="address-title">Customer Invoices</textarea>
<textarea form ="testinsert" name="address1" id="address-one"></textarea>
<!--
<textarea form ="testinsert" name="address2" id="address-two">..</textarea>
<textarea form ="testinsert" name="address3" id="address-three"></textarea>
-->
</div>
<img src="http://www.jeffbarclay.com/invoice/images/green-plus.png" class="lookup-cust-plus" id="look"/>
<table id="meta">
<tr>
<td class="meta-head">Invoice #</td>
<td><textarea form ="testinsert" id="invoice_num" name="invoice">20170130</textarea></td>
</tr>
<tr>
<td form ="testinsert" name="date" class="meta-head">Date</td>
<td><textarea id="date">Janruary 30, 1960</textarea></td>
</tr>
<tr>
<td class="meta-head">Amount Due</td>
<td><div class="due">$0.00</div></td>
</tr>
</table>
</div>
<table id="items">
<tr>
<th>Item</th> <th>Description</th> <th>Unit Cost</th> <th>Quantity</th> <th>Price</th>
</tr>
<tr class="item-row">
<td class="item-name"><div class="delete-wpr"><textarea form ="testinsert" name="item_name[]"></textarea>
<a class="delete" href="javascript:;" title="Remove row">X</a>
<a class="add-product" href="javascript:;" title="Add Product">A</a>
</div></td>
<td class="description"><textarea form ="testinsert" name="item_desc[]"></textarea></td>
<td><textarea class="cost" form ="testinsert" name="item_cost[]"></textarea></td>
<td><textarea class="qty" form ="testinsert" name="item_qty[]"></textarea></td>
<td><span class="price" form ="testinsert" name="item_price[]"></span></td>
</tr>
<tr id="hiderow">
<td colspan="5">
<img src="http://www.jeffbarclay.com/invoice/images/rows.png" width="30px" height="auto" id="addrow" href="javascript:;" title="Add a row"/>
<img src="http://www.jeffbarclay.com/invoice/images/products.png" width="30px" height="auto" href="javascript:;" id="fill-invoice" class="add-invoice" title="Add Invoice"/>
<img src="http://www.jeffbarclay.com/invoice/images/products.png" width="30px" height="auto" href="javascript:;" id="recall_product" class="recall-product" title="Recall Product"/>
</td>
</tr>
<tr>
<td colspan="2" class="blank"> </td>
<td colspan="2" class="total-line">Subtotal</td>
<td class="total-value"><div id="subtotal">$0.00</div></td>
</tr>
<tr>
<td colspan="2" class="blank"> </td>
<td colspan="2" class="total-line">Total</td>
<td class="total-value"><div id="total">$0.00</div></td>
</tr>
<tr>
<td colspan="2" class="blank"> </td>
<td colspan="2" class="total-line">Amount Paid</td>
<td class="total-value"><textarea id="paid">$0.00</textarea></td>
</tr>
<tr>
<td colspan="2" class="blank"> </td>
<td colspan="2" class="total-line balance">Balance Due</td>
<td class="total-value balance"><div id="owed" class="due">$0.00</div></td>
</tr>
</table>
<input type="hidden" form ="testinsert" name="xdate" id="xdate"></input>
<input type="hidden" form ="testinsert" name="sales" id="sales"></input>
<input type="hidden" form ="testinsert" name="owed" id="owed"></input>
<input type="hidden" form ="testinsert" name="deducted" id="deducted"></input>
<input type="hidden" form ="testinsert" name="auto_num" id="auto_num"></input>
<div id="terms">
<h5>Terms</h5>
<textarea>NET 30 Days. Finance Charge of 1.5% will be made on unpaid balances after 30 days.</textarea>
</div>
</div>
<!--Contact Form -->
<div id="store_customer_div">
<form class="form" action="insert_customer.php" id="contact" method="POST">
<img src="images/button_cancel.png" class="img" id="cancel"/>
<h3>Store Customers</h3>
<hr/><br/>
<label>Customer Name: <span>*</span></label>
<br/>
<input type="text" id="name" placeholder="Name" name="customer"/><br/>
<br/>
<label>Email: <span>*</span></label>
<br/>
<input type="text" id="email" placeholder="Email" name="email"/><br/>
<br/>
<label>Contact No: <span></span></label>
<br/>
<input type="text" id="contactno" placeholder="10 digit Mobile no." name="contact"/><br/>
<br/>
<label>Address 1: <span></span></label>
<br/>
<input type="text" id="address1" placeholder="address1" name="address1"/><br/>
<br/>
<label>Address 2: <span></span></label>
<br/>
<input type="text" id="address2" placeholder="address2" name="address2"/><br/>
<br/>
<label>Address 3: <span></span></label>
<br/>
<input type="text" id="address3" placeholder="address3" name="address3"/><br/>
<br/>
<input type="button" id="send" value="Store Customer"/><br/>
</form>
</div>
<!--Product Form -->
<div id="store_product_div">
<form class="form" action="insert_products.php" id="form_product" method="POST">
<img src="images/button_cancel.png" class="img" id="p_cancel"/>
<h3>Store Products</h3>
<hr/><br/>
<label>Product Name: <span>*</span></label>
<br/>
<input type="text" id="p_name" placeholder="Product Name" name="product"/>
<br/>
<label>Rate: <span>*</span></label>
<br/>
<input type="text" id="p_rate" placeholder="Sales Price $" name="rate"/><br/>
<br/>
<label>Cost: <span>*</span></label>
<br/>
<input type="text" id="p_cost" placeholder="Cost" name="cost"/><br/>
<br/>
<label>Taxable: <span>*</span></label>
<br/>
<input type="text" id="p_tax" placeholder="Taxable" name="taxable"/><br/>
<br/>
<label>Description: <span>*</span></label>
<br/>
<input type="text" id="p_desc" placeholder="Description" name="desc"/><br/>
<br/>
<input type="submit" id="send" value="Store Product"/><br/>
</form>
</div>
<div id="customer_div">
<form class="form" action="customer_fill.php" id="contact" method="GET">
<img src="images/button_cancel.png" class="img" id="cancel"/>
<h2>Customer List</h2>
<ul id="dropdown" name="ddname"></ul>
</form>
</div>
<div id="product_div">
<form class="form" action="product_fill.php?action=fill" id="contact" method="GET">
<img src="images/button_cancel.png" class="img" id="cancel"/>
<h2>Product List</h2>
<ul id="ddproduct" name="ddproductname"></ul>
</form>
</div>
<div id="invoice_div">
<form class="form" action="invoice_fill.php" id="contact" method="GET">
<img src="images/button_cancel.png" class="img" id="cancel"/>
<h2>Invoice List</h2>
<ul id="ddinvoice" name="ddinvoicename"></ul>
</form>
</div>
JS:
see: https://jsfiddle.net/xzt1krqn/
$(".delete").on('click', function() {
$(this).parents('.item-row').remove();
update_total();
if ($(".delete").length < 2) $(".delete").hide();
});

You have to use document selector for selecting dynamically created elements.
$(document).on('click','.delete',function(){
$(this).parents('.item-row').remove();
update_total();
if ($(".delete").length < 2) $(".delete").hide();
});

How to get JSON data from HTML form with backbone js

I am creating a dynamic form in a Backbone.js view. I want to get all the JSON data from the form in my view without using jQuery. Is there any way to get the data?
For example: When You check the checkbox, I only want the data for the checked field.
<table class="table">
<thead>
<tr>
<th></th>
<th>{{labels.selectImage}}</th>
<th>{{labels.nameVisibleToShop}}</th>
<th>{{labels.sourceCode}}</th>
<th>{{labels.pricePerItem}}</th>
</tr>
</thead>
<tbody>
<tr id ="school-imageId-{{categoryImage.cmsId}}">
<td><input type="checkbox" class="form-control mz-embrodiary-enable"/></td>
<td><img width="40px" src="{{categoryImage.imageUrl}}" /></td>
<td>
<input type="text" name="name" class="form-control" placeholder="{{labels.nameVisibleToShop}}" disabled/>
<span class="mz-validationmessage hidden" data-mz-validationmessage-for="name">{{labels.genericRequired}}</span>
</td>
<td>
<input type="text" name="sourceCode" class="form-control" placeholder="{{labels.sourceCode}}" disabled/>
<span class="mz-validationmessage hidden" data-mz-validationmessage-for="name">{{labels.genericRequired}}</span>
</td>
<td>
<input type="text" name="price" class="form-control" placeholder="{{labels.enterPrice}}" disabled/>
<span class="mz-validationmessage hidden" data-mz-validationmessage-for="price">{{labels.genericRequired}}</span>
</td>
</tr>
<tr id ="school-imageId-{{categoryImage.cmsId}}">
<td><input type="checkbox" class="form-control mz-embrodiary-enable"/></td>
<td><img width="40px" src="{{categoryImage.imageUrl}}" /></td>
<td>
<input type="text" name="name" class="form-control" placeholder="{{labels.nameVisibleToShop}}" disabled/>
<span class="mz-validationmessage hidden" data-mz-validationmessage-for="name">{{labels.genericRequired}}</span>
</td>
<td>
<input type="text" name="sourceCode" class="form-control" placeholder="{{labels.sourceCode}}" disabled/>
<span class="mz-validationmessage hidden" data-mz-validationmessage-for="name">{{labels.genericRequired}}</span>
</td>
<td>
<input type="text" name="price" class="form-control" placeholder="{{labels.enterPrice}}" disabled/>
<span class="mz-validationmessage hidden" data-mz-validationmessage-for="price">{{labels.genericRequired}}</span>
</td>
</tr>
<tr id ="school-imageId-{{categoryImage.cmsId}}">
<td><input type="checkbox" class="form-control mz-embrodiary-enable"/></td>
<td><img width="40px" src="{{categoryImage.imageUrl}}" /></td>
<td>
<input type="text" name="name" class="form-control" placeholder="{{labels.nameVisibleToShop}}" disabled/>
<span class="mz-validationmessage hidden" data-mz-validationmessage-for="name">{{labels.genericRequired}}</span>
</td>
<td>
<input type="text" name="sourceCode" class="form-control" placeholder="{{labels.sourceCode}}" disabled/>
<span class="mz-validationmessage hidden" data-mz-validationmessage-for="name">{{labels.genericRequired}}</span>
</td>
<td>
<input type="text" name="price" class="form-control" placeholder="{{labels.enterPrice}}" disabled/>
<span class="mz-validationmessage hidden" data-mz-validationmessage-for="price">{{labels.genericRequired}}</span>
</td>
</tr>
</tbody>
</table>

input boxes value of table should not be greater then input box outside of table

Hello I have developed a form where input boxes value of table should not be greater then input box outside of table.
<form>
<div class="form-group">
<label class="label1 col-md-4">Total number of sanctioned seats
<span class="required"> * </span>
</label>
<div class="col-md-7">
<input type="text" class="form-control" id="sanctionedSeatsSummary">
</div>
</div>
<table class="eduleveles table table-bordered table-hover">
<thead>
<th></th>
<th>Faculty</th>
<th>Enter sanctioned seats</th>
</thead>
<tbody>
<tr>
<td>
<input type="checkbox" name="Check" class="cbxenable">
</td>
<td>
</td>
<td>
<input type="text" class="form-control seats" name="seats">
</td>
</tr>
<tr>
<td>
<input type="checkbox" name="Check" class="cbxenable">
</td>
<td>
</td>
<td>
<input type="text" class="form-control seats" name="seats">
</td>
</tr>
<tr>
<td>
<input type="checkbox" name="Check" class="cbxenable">
</td>
<td>
</td>
<td>
<input type="text" class="form-control seats" name="seats">
</td>
</tr>
</tbody>
</table>
</form>
in above jsfiddle all ENTER SANCTIONED SEATS sum will not be greater then "Enter total number of sanctioned seats" in onchange.

You need to use jquery keyup event as I mentioned in fiddle.
Please check this fiddle
Here I just made textbox value blank if sum of three sanctioned seats are greater than total.
Also i have cleare 3 textbox if you chane total textbox
Open this link : https://jsfiddle.net/5y6na3wr/7/

$(document).ready(function(){
$(".seats").on('keyup',function(){
var total = parseInt(0) ;
$( ".seats" ).each(function( index ) {
if($(this).val()){
total = total + parseInt($(this).val());
}
});
if(total > $("#sanctionedSeatsSummary").val()){
alert("total sanctioned Seats are greater then given sanctioned Seats");
}
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<form>
<div class="form-group">
<label class="label1 col-md-4">Total number of sanctioned seats
<span class="required"> * </span>
</label>
<div class="col-md-7">
<input type="text" class="form-control" id="sanctionedSeatsSummary">
</div>
</div>
<table class="eduleveles table table-bordered table-hover">
<thead>
<th></th>
<th>Faculty</th>
<th>Enter sanctioned seats</th>
</thead>
<tbody>
<tr>
<td>
<input type="checkbox" name="Check" class="cbxenable">
</td>
<td>
</td>
<td>
<input type="text" class="form-control seats" name="seats">
</td>
</tr>
<tr>
<td>
<input type="checkbox" name="Check" class="cbxenable">
</td>
<td>
</td>
<td>
<input type="text" class="form-control seats" name="seats">
</td>
</tr>
<tr>
<td>
<input type="checkbox" name="Check" class="cbxenable">
</td>
<td>
</td>
<td>
<input type="text" class="form-control seats" name="seats">
</td>
</tr>
</tbody>
</table>
</form>

check below snippet
$(document).ready(function(){
var ttl, val;
$("input[name=seats]").on('keyup', function(){
val = 0;
$("input[name=seats]").each(function(){
if(parseInt($(this).val().trim()) > 0)
val += parseInt($(this).val().trim());
});
ttl = parseInt($("#sanctionedSeatsSummary").val().trim());
if(val > ttl)
alert("your alert");
});
})
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form>
<div class="form-group">
<label class="label1 col-md-4">Total number of sanctioned seats
<span class="required"> * </span>
</label>
<div class="col-md-7">
<input type="text" class="form-control" id="sanctionedSeatsSummary">
</div>
</div>
<table class="eduleveles table table-bordered table-hover">
<thead>
<th></th>
<th>Faculty</th>
<th>Enter sanctioned seats</th>
</thead>
<tbody>
<tr>
<td>
<input type="checkbox" name="Check" class="cbxenable">
</td>
<td>
</td>
<td>
<input type="text" class="form-control seats" name="seats">
</td>
</tr>
<tr>
<td>
<input type="checkbox" name="Check" class="cbxenable">
</td>
<td>
</td>
<td>
<input type="text" class="form-control seats" name="seats">
</td>
</tr>
<tr>
<td>
<input type="checkbox" name="Check" class="cbxenable">
</td>
<td>
</td>
<td>
<input type="text" class="form-control seats" name="seats">
</td>
</tr>
</tbody>
</table>
</form>

onfocus not working in javascript

i am putting together some javascript form validation and i cant figure out how to get this onfocus to take hold of my div... i just need it to alert me that my onfocus function is making contact with my last name imput... :(
html:
<div id="contact">
<form name="form1" action="send.php" method="post" id="contact_f">
<table id="contact_table">
<tr>
<td class="col1" colspan="2">
<h1 class="center_text">Contact Aron</h1>
<div id="error_messages">
errors
</div>
</td>
</tr>
<tr>
<td class="col1">
<label for="first_name">First Name*</label><br>
<input id="first_name" required name="Name" type="text" pattern="[a-zA-Z]+">
</td>
<td class="col2">
<label for="last_name">Last Name*</label><br>
<input id="last_name" required type="text">
</td>
</tr>
<tr>
<td class="col1">
<label for="email">Email*</label><br>
<input id="email" required type="email">
</td>
<td class="col2">
<label for="confirm_email">Confirm Email*</label><br>
<input id="confirm_email" required type="text">
</td>
</tr>
<tr>
<td class="col1">
<label for="phone">Phone Number <span id="color_gray">xxx-xxx-xxxx</span></label><br>
<input id="phone" type="tel" pattern="\d{3}[\-]\d{3}[\-]\d{4}">
</td>
<td class="col2">
</td>
</tr>
<tr class="col2">
<td class="col1" colspan="2">
<label for="message">Message*</label><br>
<textarea id="message" required type="text"></textarea>
</td>
</tr>
<tr>
<td class="col1" colspan="2">
<button id="submit_button" type="submit" value="submit">Submit Form</button>
</td>
</tr>
</table>
</form>
javascript in question:
document.getElementById("last_name").onfocus=function() {
alert("last name");
};

Actually your code is working fine. You can try it with using jquery, like this -
$(document).ready(function() {
$( "#last_name" ).focus(function() {
alert("Last name");
});
});

You need to use:
document.getElementById("last_name").onfocus=function() {
alert(this.value);
};

Try this
window.addEventListener('load',function(){
document.getElementById("last_name").addEventListener('focus',function() {
alert(this.value);
});
});

unable to call onChange event on select box

I have table structure like this below html code. Here i have a selectbox which is populated on page load from my database, i have given a inline function on the selectbox in order to call if user changes the selectbox value.. but its not calling the jquery function onChange of selectbox .. Please can you see why?
FIDDLE
My jquery:
$(document).ready(function() {
$.fn.ActivityOptionChange = function(id) {
alert("test");
};
....
....
Html
<table cellspacing="0" class="table table-condensed TF" style="width: 100%;" id="table6">
<tbody>
<tr class="fltrow">
<td><input id="flt0_table6" type="hidden" ct="0" class="flt"></td>
<td><input id="flt1_table6" type="hidden" ct="1" class="flt"></td>
<td><input id="flt2_table6" type="hidden" ct="2" class="flt"></td>
<td><input id="flt3_table6" type="hidden" ct="3" class="flt"></td>
<td><input id="flt4_table6" type="hidden" ct="4" class="flt"></td>
<td><input id="flt5_table6" type="hidden" ct="5" class="flt"></td>
<td><input id="flt6_table6" type="hidden" ct="6" class="flt"></td>
<td><input id="flt7_table6" type="hidden" ct="7" class="flt"></td>
</tr>
<tr class="success">
<td style="width: 15%;">S.no</td>
<td style="width: 15%;">Activity Name</td>
<td style="width: 5%;">Activity Option</td>
<td style="width: 5%;">Time(HR:MIN)</td>
<td style="width:10%;">cals</td>
<td style="width: 5%;">distance</td>
<td style="width: 5%;">Unit</td>
<td style="width: 15%;">Submit</td>
</tr>
<form method="post" action="/tbft/webapp/logs/insertAcitivity" id="formid44"></form>
<tr id="formrowid44" class=" odd">
<td style="width:5%;">1</td>
<td style="width:25%;" class="text-capitalize">bicycling, BMX or mountain</td>
<td style="width:25%;" class="text-capitalize">-</td>
<td style="width:15%;" class="text-capitalize">
<div style="display:inline-flex;"><input maxlength="2" id="time-hr-id44" name="timeHrTxt" size="2" type="text" style="width:25px;text-align:center;" value="00" onkeyup="$(this).CalculateCalorie(44);" placeholder=" HR"> : <input onkeyup="$(this).CalculateCalorie(44);" id="time-min-id44" name="timeMinTxt" placeholder=" MIN" type="text" style="width:25px;text-align:center;" maxlength="2" size="2" value="00"></div>
</td>
<td style="width:5%;" class="text-capitalize"><input type="text" style="display:none;" name="metsTxt" id="mets-id44" value="8.5"><span id="cals-id44" class="cals">0.00</span></td>
<td style="width:5%;" class="text-capitalize"> <input name="distanceTxt" id="distance-Id44" type="text" style="width:50px;text-align:center;"> </td>
<td style="width:5%;" class="text-capitalize">
</td>
<td style="width:5%;" class="text-capitalize"> <button onclick="$(this).SubmitForm(44);" class="btn btn-success" type="button">
<span class="glyphicon glyphicon-plus"></span>
</button>
</td>
</tr>
<form method="post" action="/tbft/webapp/logs/insertAcitivity" id="formid45"></form>
<tr id="formrowid45" class=" even">
<td style="width:5%;">2</td>
<td style="width:25%;" class="text-capitalize">bicycling/biking</td>
<td style="width:25%;" class="text-capitalize">
<select name="activity_option_id" class="selectbox" onchange="$(this).ActivityOptionChange(45)" id="activity-opn-Id45">
<option value="45_4.0">10 mph or less</option>
<option value="47_6.0">10-11.9 mph, leisure, slow, light effort</option>
<option value="46_8.0">general</option>
<option value="48_16">greater then 20 mph, racing, not drafting</option>
</select>
</td>
<td style="width:15%;" class="text-capitalize">
<div style="display:inline-flex;"><input maxlength="2" id="time-hr-id45" name="timeHrTxt" size="2" type="text" style="width:25px;text-align:center;" value="00" onkeyup="$(this).CalculateCalorie(45);" placeholder=" HR"> : <input onkeyup="$(this).CalculateCalorie(45);" id="time-min-id45" name="timeMinTxt" placeholder=" MIN" type="text" style="width:25px;text-align:center;" maxlength="2" size="2" value="00"></div>
</td>
<td style="width:5%;" class="text-capitalize"><input type="text" style="display:none;" name="metsTxt" id="mets-id45" value="4.0"><span id="cals-id45" class="cals">0.00</span></td>
<td style="width:5%;" class="text-capitalize"> <input name="distanceTxt" id="distance-Id45" type="text" style="width:50px;text-align:center;"> </td>
<td style="width:5%;" class="text-capitalize">
-
</td>
<td style="width:5%;" class="text-capitalize"> <button onclick="$(this).SubmitForm(45);" class="btn btn-success" type="button">
<span class="glyphicon glyphicon-plus"></span>
</button>
</td>
</tr>
<form method="post" action="/tbft/webapp/logs/insertAcitivity" id="formid49"></form>
<tr id="formrowid49" class=" odd">
<td style="width:5%;">3</td>
<td style="width:25%;" class="text-capitalize">unicycling</td>
<td style="width:25%;" class="text-capitalize">-</td>
<td style="width:15%;" class="text-capitalize">
<div style="display:inline-flex;"><input maxlength="2" id="time-hr-id49" name="timeHrTxt" size="2" type="text" style="width:25px;text-align:center;" value="00" onkeyup="$(this).CalculateCalorie(49);" placeholder=" HR"> : <input onkeyup="$(this).CalculateCalorie(49);" id="time-min-id49" name="timeMinTxt" placeholder=" MIN" type="text" style="width:25px;text-align:center;" maxlength="2" size="2" value="00"></div>
</td>
<td style="width:5%;" class="text-capitalize"><input type="text" style="display:none;" name="metsTxt" id="mets-id49" value="5.0"><span id="cals-id49" class="cals">0.00</span></td>
<td style="width:5%;" class="text-capitalize"> <input name="distanceTxt" id="distance-Id49" type="text" style="width:50px;text-align:center;"> </td>
<td style="width:5%;" class="text-capitalize">
</td>
<td style="width:5%;" class="text-capitalize"> <button onclick="$(this).SubmitForm(49);" class="btn btn-success" type="button">
<span class="glyphicon glyphicon-plus"></span>
</button>
</td>
</tr>
</tbody>
</table>

Try using the jQuery .on('change') function:
$(document)ready(function() {
$('body').on('change', '#activity_option_id', function() {
alert('test');
});
});
Also see .on() jQuery Documentation
EDIT: In response to your comment: If you have multiple select boxes that you need ID's for, you can implement a class based solution:
<select id="your_id_here1" class="formSelect" />
<select id="your_id_here2" class="formSelect" />
$(document)ready(function() {
$('body').on('change', '.formSelect', function() {
var elementID = this.id;
alert(elementID);
});
});
With this solution, any select box with a .formSelect class will have the change event bound to it and the ID of the particular input element changed will be displayed in the alert box.