var data = new Date();

	var year = data .getFullYear(); //获取完整的年份(4位)

  	var month = data .getMonth(); //获取当前月份(0-11,0代表1月)

	console.log("时间：："+formatDate(data));

	console.log(getMonthStartDate(year,month));

	console.log(getMonthEndDate(year,month));

　　//格式化日期：yyyy-MM-dd　　

	function formatDate(date) {　　　

	　 var myyear = date.getFullYear();　　

	　 var mymonth = date.getMonth()+1;　　

	　 var myweekday = date.getDate();　　　

	　　　　

	　 if(mymonth < 10){　　

	　　　 mymonth = "0" + mymonth;　　

	　 }　　　

	　 if(myweekday < 10){　　

	　　　 myweekday = "0" + myweekday;　　

	　 }　　

	　 return (myyear+"-"+mymonth + "-" + myweekday);　　　

	}　

	//获得某月的开始日期　　

	function getMonthStartDate(paraYear,paraMonth){　　

	　 var monthStartDate = new Date(paraYear, paraMonth, 1);　　　

	　 return formatDate(monthStartDate);　　

	}　　

	　　

	//获得某月的结束日期　　

	function getMonthEndDate(paraYear,paraMonth){

	　 var monthEndDate = new Date(paraYear,paraMonth, getMonthDays(paraYear,paraMonth));　　　

	　 return formatDate(monthEndDate);　　

	}　

	//获得某月的天数　　

	function getMonthDays(paraYear,paraMonth){　　

	　 var monthStartDate = new Date(paraYear, paraMonth, 1);　　　

	　 var monthEndDate = new Date(paraYear, paraMonth + 1, 1);　　　

	　 var　 days　 =　 (monthEndDate　 -　 monthStartDate)/(1000　 *　 60　 *　 60　 *　 24);　　　

	　 return　 days;　　　

	}

/**

* 获取本周、本季度、本月、上月的开始日期、结束日期

*/

var now = new Date(); //当前日期

var nowDayOfWeek = now.getDay(); //今天本周的第几天

var nowDay = now.getDate(); //当前日

var nowMonth = now.getMonth(); //当前月

var nowYear = now.getYear(); //当前年

nowYear += (nowYear < 2000) ? 1900 : 0; //

var lastMonthDate = new Date(); //上月日期

lastMonthDate.setDate(1);

lastMonthDate.setMonth(lastMonthDate.getMonth()-1);

var lastYear = lastMonthDate.getYear();

var lastMonth = lastMonthDate.getMonth();

//格式化日期：yyyy-MM-dd

function formatDate(date) {

var myyear = date.getFullYear();

var mymonth = date.getMonth()+1;

var myweekday = date.getDate(); 

if(mymonth < 10){

mymonth = "0" + mymonth;

}

if(myweekday < 10){

myweekday = "0" + myweekday;

}

return (myyear+"-"+mymonth + "-" + myweekday);

} 

//获得某月的天数

function getMonthDays(myMonth){

var monthStartDate = new Date(nowYear, myMonth, 1);

var monthEndDate = new Date(nowYear, myMonth + 1, 1);

var days = (monthEndDate - monthStartDate)/(1000 * 60 * 60 * 24);

return days;

} 

//获得本季度的开始月份

function getQuarterStartMonth(){

var quarterStartMonth = 0;

if(nowMonth<3){

quarterStartMonth = 0;

}

if(2<nowMonth && nowMonth<6){

quarterStartMonth = 3;

}

if(5<nowMonth && nowMonth<9){

quarterStartMonth = 6;

}

if(nowMonth>8){

quarterStartMonth = 9;

}

return quarterStartMonth;

} 

//获得本周的开始日期

function getWeekStartDate() {

var weekStartDate = new Date(nowYear, nowMonth, nowDay - nowDayOfWeek);

return formatDate(weekStartDate);

} 

//获得本周的结束日期

function getWeekEndDate() {

var weekEndDate = new Date(nowYear, nowMonth, nowDay + (6 - nowDayOfWeek));

return formatDate(weekEndDate);

} 

//获得本月的开始日期

function getMonthStartDate(){

var monthStartDate = new Date(nowYear, nowMonth, 1);

return formatDate(monthStartDate);

} 

//获得本月的结束日期

function getMonthEndDate(){

var monthEndDate = new Date(nowYear, nowMonth, getMonthDays(nowMonth));

return formatDate(monthEndDate);

}

//获得上月开始时间

function getLastMonthStartDate(){

var lastMonthStartDate = new Date(nowYear, lastMonth, 1);

return formatDate(lastMonthStartDate);

}

//获得上月结束时间

function getLastMonthEndDate(){

var lastMonthEndDate = new Date(nowYear, lastMonth, getMonthDays(lastMonth));

return formatDate(lastMonthEndDate);

}

//获得本季度的开始日期

function getQuarterStartDate(){ 

var quarterStartDate = new Date(nowYear, getQuarterStartMonth(), 1);

return formatDate(quarterStartDate);

} 

//或的本季度的结束日期

function getQuarterEndDate(){

var quarterEndMonth = getQuarterStartMonth() + 2;

var quarterStartDate = new Date(nowYear, quarterEndMonth, getMonthDays(quarterEndMonth));

return formatDate(quarterStartDate);

}