Allow parent selection

HTML

<script src="http://emtolis.gr/tsamigr/ccombo/libs/jquery.ba-outside-events.min.js"></script>
<script src="http://emtolis.gr/tsamigr/ccombo/v2.0/jquery.combo.js"></script>
<link rel="stylesheet" href="http://emtolis.gr/tsamigr/ccombo/v2.0/css/style.css">
<h1>ccombo - Allow parent selection in tree format</h1>
<hr />
<div class='buttons'>
    <input class='stylishBut ' id ='create' type='button' value='Create ccombo' />
</div>
<hr /><br />
<div class='example'>
    <div id='allow'></div>
</div>
<div class='example'>
    <div id='notAllow'></div>
</div>
<select id="group" multiple="multiple">
    <optgroup LABEL="Firefox">
        <option LABEL="2.0 or higher">Firefox 2.0 or higher</option>
        <option LABEL="1.5.x">Firefox 1.5.x</option>
        <option LABEL="1.0.x">Firefox 1.0.x</option>
    </optgroup>
    <optgroup LABEL="Microsoft Internet Explorer">
        <option LABEL="7.0 or higher">Microsoft Internet Explorer 7.0 or higher</option>
        <option LABEL="6.x">Microsoft Internet Explorer 6.x</option>
        <option LABEL="5.x">Microsoft Internet Explorer 5.x</option>
        <option LABEL="4.x">Microsoft Internet Explorer 4.x</option>
    </optgroup>
    <optgroup LABEL="Microsoft Internet Explorer 9">
        <option LABEL="B1">Beta 1</option>
        <option LABEL="B2">Beta 2</option>
        <option LABEL="B3">Beta 3</option>
        <option LABEL="B4">Beta 4</option>
    </optgroup>
    <optgroup LABEL="Opera">
        <option LABEL="9.0 or higher">Opera 9.0 or higher</option>
        <option LABEL="8.x">Opera 8.x</option>
        <option LABEL="7.x">Opera 7.x</option>
    </optgroup>
    <option >Safari</option>
    <option >Other</option>
</select>

CSS

.stylishBut {
    background: none repeat scroll 0 0 #F0F7FB;
    border: 1px solid #B8CFE5;
    color: #1C94C4;
    cursor: pointer;
    font-size: 11px;
    font-weight: bold;
    height: 25px;
    min-width: 70px;
    padding: 2px;
}

.stylishBut:hover{
    background: none repeat scroll 0 0 #FDFADA;    border: 1px solid #FBCB09;
    color: #C77405 !important;
    font-weight: bold;
}

.buttons{
    margin-bottom:10px;   
}

JavaScript

jQuery(document).ready(function() {
    jQuery('#create').click(

    function() {
        var created = jQuery('#allow').combo({
            'selectId': 'group',
            'select_categories': true
        });
        var created = jQuery('#notAllow').combo({
            'selectId': 'group',
            'select_categories': false
        });
    });
});