Js日期处理

1.日期大小比较

<script>
var beginDate=$("#beginDate").val();  
 var endDate=$("#endDate").val();  
 var d1 = new Date(beginDate.replace(/-/g, "/"));  
 var d2 = new Date(endDate.replace(/-/g, "/"));  

  if(beginDate!=""&&endDate!=""&&d1 >=d2)  
 {  
  alert("开始时间不能大于结束时间！");  
  return false;  
 }
 </script>

 2.增减天数

    /**
     * 调整时间
     * @param {any} date 时间
     * @param {any} day 增减天数
     */
    function formatTime(date,day) {
        var now = date.split('-');
        now = new Date(Number(now['0']), (Number(now['1']) - 1), Number(now['2']))
        now.setDate(now.getDate() + day)
        var year = now.getFullYear();
        var month = now.getMonth() + 1, month = month < 10 ? '0' + month : month;
        var day = now.getDate(), day = day < 10 ? '0' + day : day;
        return year + '-' + month + '-' + day;
    }