js获取当月的最后一天

以下就是JS代码::

@ author YHC:

  function getCurrentMonthLastDay(){
    	var current=new Date();
    	var currentMonth=current.getMonth();
    	var nextMonth=++currentMonth;
    	
    	var nextMonthDayOne =new Date(current.getFullYear(),nextMonth,1);
    	
    	var minusDate=1000*60*60*24;
    	
    	return new Date(nextMonthDayOne.getTime()-minusDate);
    }

 function getCurrentMonthFirstDay(){
    	var current=new Date();
    	    current.setDate(1);
    	return current;
    }