SOURCE

var d1 = new Date ('6/29/2011 4:52:48'), 
    d2 = new Date (d1); 
    d3 = new Date ();
d2.setHours (d1.getHours() + 2); 
var mytime=d3.toLocaleTimeString(); //获取当前时间

console.log(d1)
console.log(d2)
console.log(d3)
console.log(mytime)
console.log(d3.getHours()); //获取当前小时数(0-23)

/*
var d1 = new Date ('6/29/2011 4:52:48'), 
    d2 = new Date (d1); 
    d3 = new Date ();
 1 myDate.getYear(); //获取当前年份(2位)
 2 myDate.getFullYear(); //获取完整的年份(4位,1970-????)
 3 myDate.getMonth(); //获取当前月份(0-11,0代表1月)
 4 myDate.getDate(); //获取当前日(1-31)
 5 myDate.getDay(); //获取当前星期X(0-6,0代表星期天)
 6 myDate.getTime(); //获取当前时间(从1970.1.1开始的毫秒数)
 7 myDate.getHours(); //获取当前小时数(0-23)
 8 myDate.getMinutes(); //获取当前分钟数(0-59)
 9 myDate.getSeconds(); //获取当前秒数(0-59)
10 myDate.getMilliseconds(); //获取当前毫秒数(0-999)
11 myDate.toLocaleDateString(); //获取当前日期
12 var mytime=myDate.toLocaleTimeString(); //获取当前时间
13 myDate.toLocaleString( ); //获取日期与时间
*/