bootstrap datepicker限定可选时间范围实现方法

<span style="font-size:14px;"><div class="col-md-6 cy-text-right-md"> 
<div class="form-inline"> 
<div class="form-group cy-mar-ver-s"> 
<span class="cy-pad-hor-s">最后接入时间</span> 
</div> 
<div class="input-daterange input-group" id="datepicker"> 
<input type="text" class="form-control" name="start" id="qBeginTime" /> 
<span class="input-group-addon">至</span> 
<input type="text" class="form-control" name="end" id="qEndTime" /> 
</div> 
<div class="form-group cy-mar-ver-s"> 
<button class="btn btn-primary cy-pad-rgt-s" onclick="javascript:doQuery();" type="button">搜索</button> 
</div> 
</div> 
</div></span> 

<span style="font-size:14px;"> //开始时间： 
$('#qBeginTime').datepicker({ 
todayBtn : "linked", 
autoclose : true, 
todayHighlight : true, 
endDate : new Date() 
}).on('changeDate',function(e){ 
var startTime = e.date; 
$('#qEndTime').datepicker('setStartDate',startTime); 
}); 
//结束时间： 
$('#qEndTime').datepicker({ 
todayBtn : "linked", 
autoclose : true, 
todayHighlight : true, 
endDate : new Date() 
}).on('changeDate',function(e){ 
var endTime = e.date; 
$('#qBeginTime').datepicker('setEndDate',endTime); 
});</span>