JS - Javascript not working on first load create screen / change issue type


i've ran into an issue that i cannot seem to resolve. 

My javascript function only loads on the second try after opening the create screen. 

The following is my full JS code that i place under the description field:

<input class="callAPIBtn" type="button" id="apiBttn" value="Retrieve Info">

<p id="text"></p>

<script type="text/javascript">

AJS.$(document).ready(function() {
AJS.$("#apiBttn").click(function() {

var invalidCustNum = "<font color='red'>Invalid Customer ID, please try again</font>";
var cid = getCustomFieldValue(10000).trim();

if (cid.length != 9 || cid.substring(0, 3) != "100"){


} else {

var url = "http://RESTAPI/" + cid + "/";

url: url,
success: function(result){

// Key = customfield ID, Value = Value of JSON object
var customfields = {
10004: "firstName",
10005: "lastName",
10301: "emailAddress",
10674: "address",
10024: "mobilePhone"

for (cf in customfields) {
var id = "customfield_" + cf;

if (document.getElementById(id)) {
setCustomFieldValue(cf, result[customfields[cf]].trim().replace(" "," "));

//Second Webbus call to get Service ID
var servicesURL = "RESTAPI" + cid + "/services?status=active"

url: servicesURL,
success: function(result){

var text = "";

for (val in result) {

text += result[val]["accountNumber"] + " - " + result[val]["serviceIdentifier"] + " - " + result[val]["serviceType"].toUpperCase() + "<br/>";

display("<font color='green'>Success</font>" + "<br/><br/>" + text + "<br/>");


}, error: function(data) {

display("<font color='red'>Error! Please try again</font>");


function display(text) {
document.getElementById("text").innerHTML = text;

function getCustomFieldValue(id) {
var customField = "#customfield_" + id;
var fieldVal = AJS.$(customField).val();
return fieldVal;

function setCustomFieldValue(id, value) {
var customFieldId = "#customfield_" + id;


<style type="text/css" style="display: none">

.callAPIBtn {
font-family: verdana;
color: #1E286A !important;
font-size: 10px;
box-shadow: 1px 1px 1px #BEE2F9;
padding: 3px 12px;
-moz-border-radius: 5px;
-webkit-border-radius: 5px;
border-radius: 5px;
border: 1px solid #3866A3;
background: #FFFFFF;

.callAPIBtn:hover {
color: #14396A !important;
background: #468CCF;
background: linear-gradient(top, #468CCF, #63B8EE);
background: -ms-linear-gradient(top, #468CCF, #63B8EE);
background: -webkit-gradient(linear, left top, left bottom, from(#468CCF), to(#63B8EE));
background: -moz-linear-gradient(top, #468CCF, #63B8EE);


I'd appreciate any suggestion or help with this. 

Thank you in advance.






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