Show Hide panel

HTML

<input class="btn teach_edit_header_buttons" style="font-family:Helvetica" type="submit" value="Add Div">
<div id='parent'></div>

JavaScript

$(function () {

    $("input[type=submit]").click(function () {

        var len = $('#parent').children('div').length;
        var id = "item" + (len + 1);
        $("<div id='" + id + "'/>").html(id).appendTo("#parent");
    })

});