js时间格式化

/*
 * 日期格式化
 * =========*/
function dateformat(date, format){
    var paddNum = function(num){
        num += "";
        return num.replace(/^(d)$/, "0$1");
    }
    if(date == null){
        return date;
    }
    if(typeof date == 'string'){
        date = new Date(date.replace(/-/g, '/'));
    }else if(typeof date == 'number'){
        date = new Date(date);
    }
    
    //时间格式字符
    var cfg = {
        yyyy: date.getFullYear(),
        yy: date.getFullYear().toString().substring(2),
        MM: paddNum(date.getMonth() + 1),
        M: date.getMonth() + 1,
        dd: paddNum(date.getDate()),
        d: date.getDate(),
        HH: paddNum(date.getHours()),
        mm: paddNum(date.getMinutes()),
        ss: paddNum(date.getSeconds())
    }
    format || (format = 'yyyy-MM-dd HH:mm:ss');
    return format.replace(/([a-z])(1)*/ig, function(m){
        return cfg[m];
    })
}