js获取时间和日期，字符串和时间戳之间的转换

//获取当前时间：
  var myDate = new Date();//当前时间
  var year = myDate.getFullYear();//当前年份
  var month = myDate.getMonth() + 1;//当前月份
  var day = myDate.getDate();//当前日
  myDate.getYear();        //获取当前年份(2位)
    myDate.getFullYear();    //获取完整的年份(4位,1970-????)
    myDate.getMonth();       //获取当前月份(0-11,0代表1月)
    myDate.getDate();        //获取当前日(1-31)
    myDate.getDay();         //获取当前星期X(0-6,0代表星期天)
    myDate.getTime();        //获取当前时间(从1970.1.1开始的毫秒数)
    myDate.getHours();       //获取当前小时数(0-23)
    myDate.getMinutes();     //获取当前分钟数(0-59)
    myDate.getSeconds();     //获取当前秒数(0-59)
    myDate.getMilliseconds();    //获取当前毫秒数(0-999)
    myDate.toLocaleDateString();     //获取当前日期
    var mytime=myDate.toLocaleTimeString();     //获取当前时间
    myDate.toLocaleString( );        //获取日期与时间

  var oneDay = 1000 * 60 * 60 * 24;

//获取最近一周的日期
  var lastDate = new Date(myDate - oneDay * 6);
  var lastYear = lastDate.getFullYear();
  var lastMonth = lastDate.getMonth() + 1;
  var lastDay = lastDate.getDate();

//获取当前月的最后一天
  var day = new Date(year ,month , 0);
  var lastdate = day.getDate();//当前月的最后一天

//获取最近N个月的日期   
   var lastDate = new Date(myDate - oneDay * myDate.getDate());
   lastDate = new Date(lastDate - N * oneDay * (lastDate.getDate() - 1));
   var lastYear = lastDate.getFullYear();
   var lastMonth = lastDate.getMonth() + 1;
   var lastDay = lastDate.getDate();

//字符串转换为时间戳
   var date="2014-12-06";
   date = new Date(Date.parse(date.replace(/-/g, "/")));
   date = date.getTime();