JavaScript时间格式化，继承Date原形添加自定义格式化方法

1. [代码]继承Date原形添加格式化方法    

Date.prototype.pattern=function(fmt) {         
    var o = {         
    "M+" : this.getMonth()+1, //Month         
    "d+" : this.getDate(), //Day          
    "h+" : this.getHours()%12 == 0 ? 12 : this.getHours()%12, //12 hour        
    "H+" : this.getHours(), //24 hour         
    "m+" : this.getMinutes(), //Minute         
    "s+" : this.getSeconds(), //Second         
    "q+" : Math.floor((this.getMonth()+3)/3), //Quarter        
    "S"  : this.getMilliseconds(), //Millisecond
    't+' : this.getHours() < 12 ? 'am' : 'pm',
    'T+' : this.getHours() < 12 ? 'AM' : 'PM'
    };         
    var week = {         
    "0" : "Sunday",     
    "1" : "Monday",         
    "2" : "Tuesday",         
    "3" : "Wednesday",         
    "4" : "Thursday",         
    "5" : "Friday",         
    "6" : "Saturday"        
    };         
    if(/(y+)/.test(fmt)){         
        fmt=fmt.replace(RegExp.$1, (this.getFullYear()+"").substr(4 - RegExp.$1.length));         
    }         
    if(/(E+)/.test(fmt)){         
        fmt=fmt.replace(RegExp.$1, week[this.getDay()+""]);         
    }         
    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;         
}  

2. [图片] QQ截图20160429021637.png