<span style="font-family: Arial, Helvetica, sans-serif;"><div class="modal fade" id="sureclice" tabindex="-1" role="dialog"aria-labelledby="myModalLabel"></span>

<span style="font-family: Arial, Helvetica, sans-serif;"><span style="white-space:pre">	</span><div class="modal-dialog" role="document"style="width: 20%; margin-top: 15%"></span>
 

	<span style="white-space:pre">	</span><div class="modal-content">
			<div class="modal-header" style="background: #C8E7F9">
				<button type="button" class="close" 
<span style="white-space:pre">					</span>data-dismiss="modal"aria-label="Close">
					<span aria-hidden="true">×</span>
				</button>
			</div>
<span style="white-space:pre">		</span><div class="modal-body">
	<h4 class="modal-title" id="myModalLabel" style="text-align: center;font-weight: bold;">
<span style="white-space:pre">		</span>請選擇之後再操作
<span style="white-space:pre">	</span></h4>
<span style="white-space:pre">		</span></div>
	<div class="modal-footer">
		<button type="button" class="btn btn-default" data-dismiss="modal">確定</button>
	</div>
</div>
</div>
</div>


 <h3>2. 獲取checkbox選中的個數</h3>
<input type="checkbox" name="ifAll">

<script>
$("input[name='ifAll']:checked").length)
</script>