How can I read the Ids on of Div elemnt for LI tag : I want the Ids of all the li elemnt under div text. 

    <div id="editSortable"> 
    <ul class="sortable-list  ui-sortable">
        <li id="id1">Test 1</li>
        <li id="id2">Test 2</li>
        <li id="id3">Test 3</li>
    </ul>
    </div>

I need output as id1, id2, id3 as a string. 
Please suggest. 