关于时间的

自定义日期时间格式 

function dateToString(now){

      var year = now.getFullYear();

      var month =toTwo(  now.getMonth()+1 );

      var d =toTwo(  now.getDate() );

      var h = toTwo( now.getHours() ) ;

      var m = toTwo( now.getMinutes() );

      var s = toTwo( now.getSeconds() );

      return year+"-"+month+"-"+d + " " + h + ":" + m + ":" +s;

}

function toTwo( str ){

      return str<10 ? "0"+str : str;

}

 

将字符串转成日期时间格式

function stringToDate( str ){

      return new Date( str );

}

 

时间差函数

function diff(start,end){

      return (end.getTime()-start.getTime())/1000;

}