JqWidget tabs - dynamically add tab with ajax content - jqwidget

Question

I want create a dynamic on click append data to tab but I get in the tab undefined. Could you tell me whats wrong? Not quite sure what is the case,
My js
<script type="text/javascript">
$(document).ready(function () {
// Create jqxTabs.
$('#jqxTabs').jqxTabs({ width: 580, height: 200,showCloseButtons: true });
var length = $('#jqxTabs').jqxTabs('length') + 1;
var loadPage = function (url) {
$.get(url, function (data) {
data;
// console.log( $('#content' + length ).text(data));
// console.log(data);
});
}
$('div.s span').click(function() {
var getvalue = $(this).attr('rel');
$('#jqxTabs').jqxTabs('addFirst', 'Sample title',loadPage(getvalue).text());
$('#jqxTabs').jqxTabs('ensureVisible', -1);
});
// $('#jqxTabs').on('selected', function (event) {
// var pageIndex = event.args.item + 1;
// loadPage('pages/ajax' + pageIndex + '.htm', pageIndex);
// });
});
</script>
My html
<div class="s">
<span rel="gen.php">Load</span>
</div>
<div id='jqxWidget'>
<div id='jqxTabs'>
<ul>
</ul>
</div>
</div>

Answer 1

So first check the right syntax for tab control:
HTML:
....
<div id='jqxTabs'>
<ul>
<li></li>
</ul>
<div></div>
</div>
Javascript:
// Create jqxTabs.
$('#jqxTabs').jqxTabs({ width: 580, height: 200, showCloseButtons: true });
$('#jqxTabs').jqxTabs("removeFirst"); //here removes the empty tab
//here the function must return the content, and the ajax must be async false for this purpose
var loadPage = function (url) {
var result = null;
$.ajax({
url: url,
type: 'get',
dataType: 'html',
async: false,
success: function(data) {
result = data;
}
});
return result;
}
$('div.s span').click(function() {
var getvalue = $(this).attr('rel');
$('#jqxTabs').jqxTabs('addFirst', 'Sample title', loadPage(getvalue));
$('#jqxTabs').jqxTabs('ensureVisible', -1);
});
For better understanding check: http://jsfiddle.net/charlesrv/h4573ykv/1/
EDIT: For the new condition, use a custom attribute so checking would be easier:
$('div.s span').click(function() {
var getvalue = $(this).attr('rel');
var opened = $(this).attr('opened');
if (!opened) {
$(this).attr('opened', true);
$('#jqxTabs').jqxTabs('addFirst', 'Sample title', loadPage(getvalue));
$('#jqxTabs').jqxTabs('ensureVisible', -1);
}
});