js获取系统当前时间

function getDatestr(){

//visitTime

var now=new Date();

var year=now.getFullYear();

var month =now.getMonth()+1;

var day=now.getDate();

var hour=now.getHours();

var minute=now.getMinutes();

if(month<10){

month="0"+month;

}

if(day<10){

day="0"+day;

}

if(hour<10){

hour="0"+hour;

}

if(minute<10){

minute="0"+minute;

}

var nowdate=year+"-"+month+"-"+day+" "+hour+":"+minute;

$('#visitTime').val(nowdate);

}