日期格式化类

日期格式化类

/*日期格式化*/
Date.prototype.Format = function(fmt) 
{  
  var o = { 
    "M+" : this.getMonth()+1,                 //月份 
    "d+" : this.getDate(),                    //日 
    "h+" : this.getHours(),                   //小时 
    "m+" : this.getMinutes(),                 //分 
    "s+" : this.getSeconds(),                 //秒 
    "q+" : Math.floor((this.getMonth()+3)/3), //季度 
    "S"  : this.getMilliseconds()             //毫秒 
  }; 
  if(/(y+)/.test(fmt)) 
    fmt=fmt.replace(RegExp.$1, (this.getFullYear()+"").substr(4 - RegExp.$1.length)); 
  for(var k in o) 
    if(new RegExp("("+ k +")").test(fmt)) 
  fmt = fmt.replace(RegExp.$1, (RegExp.$1.length==1) ? (o[k]) : (("00"+ o[k]).substr((""+ o[k]).length))); 
  return fmt; 
};

/* 得到日期年月日等加数字后的日期 */
Date.prototype.dateAdd = function(interval,number)
{
  var d = this;
 var k={'y':'FullYear',
		'q':'Month',
		'm':'Month',
		'w':'Date',
		'd':'Date',
		'h':'Hours',
		'n':'Minutes',
		's':'Seconds',
		'ms':'MilliSeconds'}; 
  var n={'q':3,'w':7};
 eval（'d.set'+k[interval]+'(d.get'+k[interval]+'()+'+((n[interval]||1)*number)+')');
    return d;
};

/* 计算两日期相差的日期年月日等 */
Date.prototype.dateDiff = function(interval,objDate2)
{
  var d=this, i={},
  t=d.getTime(), t2=objDate2.getTime();
  i['y']=objDate2.getFullYear()-d.getFullYear();
  i['q']=i['y']*4+Math.floor(objDate2.getMonth()/4)-Math.floor(d.getMonth()/4);
  i['m']=i['y']*12+objDate2.getMonth()-d.getMonth();
  i['ms']=objDate2.getTime()-d.getTime();
  i['w']=Math.floor((t2+345600000)/(604800000))-Math.floor((t+345600000)/(604800000));
  i['d']=Math.floor(t2/86400000)-Math.floor(t/86400000);
  i['h']=Math.floor(t2/3600000)-Math.floor(t/3600000);
  i['n']=Math.floor(t2/60000)-Math.floor(t/60000);
  i['s']=Math.floor(t2/1000)-Math.floor(t/1000);
    return i[interval];
};