js日期操作

1、最基本的日期操作

var mydate = new Date();

• set/get   FullYear,Month,Date,Hour,Minutes,Second可以随意拼接
• toLocaleDateString,toLocaleTimeString,toLocaleString可以获取时间字符串

2、前1天，后1天..

 function getNextDay(currentDate, scaleStep) {
     var nextDate = new Date(currentDate);
     for ( var hourIncreates = 1;; hourIncreates++) {
         nextDate.setHours(nextDate.getHours() + scaleStep * hourIncreates);
         if (nextDate.getDate() != currentDate.getDate()) {
             dateStr = nextDate.getFullYear() + "-"
                     + toDouble((nextDate.getMonth() + 1) + '') + "-"
                     + toDouble(nextDate.getDate() + '');
             break;
         }
     }
     return dateStr;
 }