Disable jQuery dialog memory - jquery-ui

Question

I'm trying to create dynamic dialog, with one input field and with some texts. Problem is, that dialog remembers value of old input fields and is not updating them. I created JSfiddle example of my problem. If you click on <li> element than dialog will come up. There is one input field, that is changing content of <li> element and some pointless text. Problem comes if, when you change content of input field and save it, from this time is stopped being dynamic and become pure static field. I totally don't understand why. PS Sorry for my bad english
HTML
<div id="dialog" title="text">
<input type="text" id="xxx" value="test">Some text
</div>
<ul>
<li id="menu-item-1">one</li>
<li id="menu-item-2">two</li>
<li id="menu-item-3">three</li>
</ul>
JavaScript
$('li').click(function () {
$('#xxx').attr("value", $(this).text());
$("#dialog").dialog('open').data("opener", this.id);
});
$("#dialog").dialog({
autoOpen: false,
modal: true,
buttons: {
Save: function () {
$('#' + $("#dialog").data("opener")).text($("#xxx").val());
$(this).dialog('close');
},
Storno: function () {
$(this).dialog('close');
}
}
});
jsfiddle

Answer 1

Change the dialog to a <form>, then use its reset() method.
$('li').click(function() {
$('#xxx').attr("value", $(this).text());
$("#dialog").dialog('open').data("opener", this.id);
});
$("#dialog").dialog({
autoOpen: false,
modal: true,
buttons: {
Save: function() {
$('#' + $("#dialog").data("opener")).text($("#xxx").val());
$(this).dialog('close');
this.reset();
},
Storno: function() {
$(this).dialog('close');
this.reset();
}
}
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<link href="http://code.jquery.com/ui/1.9.2/themes/base/jquery-ui.css" rel="stylesheet" />
<script src="http://code.jquery.com/ui/1.9.2/jquery-ui.js"></script>
<form id="dialog" title="text">
<input type="text" id="xxx" value="test">Some text</form>
<ul>
<li id="menu-item-1">one</li>
<li id="menu-item-2">two</li>
<li id="menu-item-3">three</li>
</ul>

Answer 2

I think you can easily achieve what you want to achieve by setting the input value with the jquery val() method on the input.
Here is what i mean
Change this
$('#xxx').attr("value", $(this).text());
to this
$('#xxx').val($(this).text());
And here is a working jsfiddle http://jsfiddle.net/gzx3z6e5/