Loop thru child DIVs and Get IDs
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I have my HTML setup as follows (IDs are madeup for sake of example):

    <div id="selected-area">
        <div id="01" class="folder-ready"> </div>
        <div id="02" class="folder-ready"> </div>
        <div id="03" class="folder-ready"> </div>
        <div id="04" class="folder-ready"> </div>
        <div id="05" class="folder-ready"> </div>
    </div>

What is the simplest method to loop through all child DIVs of `selected-area` and put each of their IDs into an array?