How To I Find Out All The Element In The Page Is Loadded Javascript

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hi there I am working on this issue
where I have a bellow cord

JavaScript

<script type="text/javascript">
    $(document).ready(function () {
        $("#main").load('@Model.PayjaxUrl', function () {
            $("#main").ready(function () {
var block = "<table class=\"inputMessage\"><tr><td id=\"-validation-message\"></td></tr></table>";
    block += "<div class=\"fldFlag\"></div>";
    block += "<div class=\"messageArrow\"></div>";
    var amountvalidation = document.getElementById('input-group-placeholder');
    amountvalidation.insertAdjacentHTML('beforeend', block);

where I am trying to add a html string to a div which is crated by loading the content in the url path PayjaxUrl

once the payjaxUrl is loaded I can see the bellow div

HTML

<div class="input-group-placeholder">
                            <input type="text" class="form-control" id="CardHolderName" name="CardHolderName" value="Mr">
                            <span class="input-group-addon form-control-feedback-error">
                                <span class="glyphicon glyphicon-remove"></span>
                            </span>
                            <span class="input-group-addon form-control-feedback-success">
                                <span class="glyphicon glyphicon-ok"></span>
                            </span>
                        </div>

but my JavaScript through bellow error
Uncaught TypeError: Cannot read property 'insertAdjacentHTML' of null

appreciate if some one could point me out what I am doing wrong
thanks

Posted 10-Jun-14 4:41am

rushdy20

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jim lahey · Accepted Answer · 2014-06-10T05:39:00

Your call to:

var amountvalidation = document.getElementById('input-group-placeholder');

is where you're going wrong. You're trying to get the element by it's ID attribute, yet the element you're looking for doesn't even have an ID attribute, let alone one sporting that value.

Try this:

XML

<div id="amountValidationElement" class="input-group-placeholder">
    <input type="text" class="form-control" id="CardHolderName" name="CardHolderName" value="Mr">
    <span class="input-group-addon form-control-feedback-error">
        <span class="glyphicon glyphicon-remove"></span>
    </span>
    <span class="input-group-addon form-control-feedback-success">
        <span class="glyphicon glyphicon-ok"></span>
    </span>
</div>

With the following call to getElementById:

var amountvalidation = document.getElementById('amountValidationElement');