datepicker.html

<form class="form-inline">
	<div class="form-group">
		<div class="input-group">
			<input type="text" id="begin" class="form-control datepicker" data-end="#end" value="2014/08/10" size="12">
			<span class="input-group-btn">
				<button class="btn btn-default" type="button" data-toggle="datepicker" data-target="#begin">
				<span class="glyphicon glyphicon-calendar"></span></button>
			</span>
		</div>
	</div>
	～
	<div class="form-group">
		<div class="input-group">
			<input type="text" id="end" class="form-control datepicker" data-begin="#begin" value="2014/08/20" size="12">
			<span class="input-group-btn">
				<button class="btn btn-default" type="button" data-toggle="datepicker" data-target="#end">
				<span class="glyphicon glyphicon-calendar"></span></button>
			</span>
		</div>
	</div>
</form>