.on( events [, selector ] [, data ], handler(eventObject) )
<ul id="shortcutUl" class="thumbnails">
<li class="span2" href="/bms/execution/index">
<div class="thumbnail shortcut" style="height:120px">
<div>
<h5>数据录入</h5>
</div>
</div>
</li>
</ul>
$("#shortcutUl").on("click", ".shortcut", function (e) {
console.log($(e.target));
})
click“数据录入”, console是会输出oboject{h5}的，即.on()的.selector参数选出来的元素是会包含子节点的？
