am trying to set select/option values using jquery Mobile and can't seem to get it working.

<!-- Complete example below. -->

<!DOCTYPE html>
<html>
<head>
    <link rel="stylesheet" href="jquery.mobile/jquery.mobile.css" /> 
    <script type="text/javascript" src="jquery.mobile/jquery.js"></script>
    <script type="text/javascript" src="jquery.mobile/jquery.mobile.js"></script>
</head>
<body>

<div data-role="page" id="mainmenu">
    <div data-role="header" data-position="inline">
    <h1>Main Menu</h1>
    </div>
    <div class="ui-body ui-body-c">
    <div data-role="content">   
        <div id='placeholderA' ></div>  
        <div id='placeholderB' ></div>  
    <div class="ui-block-b"><button type="submit"  id="addPart" data-theme="a" data-icon="plus">Add Serial/Part</button></div>
    </div>
</body>
</html>         

<script>        

    var currentTab = "A";       

    // An XML fragment
    testXML =  "<?xml version='1.0' encoding='UTF-8' ?>\
    <Doc>\
        <DtlFields>\
            <ACTC>B</ACTC>\
            <QTY>5</QTY>\
        </DtlFields>\
        <DtlFields>\
            <ACTC>A</ACTC>\
            <QTY>6</QTY>\
        </DtlFields>\
    </Doc>";

    // An HTML fragment
    section = "<ul data-role='listview' data-theme='a'>\
            <li>PART: <span class='thisSection'></span>\
            <div data-role='fieldcontain'>\
                <label>A Label</label>\
                <select name='ACTC' id='preAction' data-theme='a'>\
                <option value='A'>A</option>\
                <option value='B'>B</option>\
                <option value='C'>C</option>\
           
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