function dateToStr(datetime){

var year = datetime.getFullYear();

var month = datetime.getMonth()+1;//js从0开始取

var date = datetime.getDate();

var hour = datetime.getHours();

var minutes = datetime.getMinutes();

var second = datetime.getSeconds();

if(month<10){

month = "0" + month;

}

if(date<10){

date = "0" + date;

}

if(hour <10){

hour = "0" + hour;

}

if(minutes <10){

minutes = "0" + minutes;

}

if(second <10){

second = "0" + second ;

}

var time = year+"-"+month+"-"+date+" "+hour+":"+minutes+":"+second; //2009-06-12 17:18:05

// alert(time);

return time;

}