<input type="checkbox" name="cbx-1">
<input type="checkbox" name="cbx-2">
<input type="checkbox" name="cbx-3">

<input type="text" id="text">

<button type="button" id="bt-ok">Ok</button>

<script type="text/javascript">
$('#bt-ok').click(function() {
    $("input:checkbox[name=type]:checked").each(function(){
        $("#text").val($(this).val());
    });
});
</script>