Click button to display XML format

I searched but couldn't figure this out.

How would I add a button to my javascript that when clicked, shows the code in XML format in some way?

Here is a jsfiddle for my code: http://ift.tt/1yDUCVW

Thanks

    <div class='teststyles'>

<h3>Test</h3>
Name/Value Pair
    <br />
    <input id="PairTextbox" type="text" />=<input id="PairTextbox1" type="text" />
    <input type="button" value="Add" id="addButton" />
    <br />
    <br />Name/Value Pair List
    <br />
    <select multiple="multiple" id="PairListbox"></select>
    <input type="button" value="Sort By Name" sort-type="0" id="sortName">
    <input type="button" value="Sort By Value" sort-type="1" id="sortValue"><br>
    <input type="button" value="Delete" id="deleteButton" />

...