js设定时间格式化函数，使用new Date().format(“yyyyMMddhhmmss”);

设定时间格式化函数，使用new Date().format(“yyyyMMddhhmmss”);

Date.prototype.format = function (format) {  
    var args = {  
        "M+": this.getMonth() + 1,  
        "d+": this.getDate(),  
        "h+": this.getHours(),  
        "m+": this.getMinutes(),  
        "s+": this.getSeconds(),  
    };  
    if (/(y+)/.test(format))  
        format = format.replace(RegExp.$1, (this.getFullYear() + "").substr(4 - RegExp.$1.length));  
    for (var i in args) {  
        var n = args[i];  
        if (new RegExp("(" + i + ")").test(format))  
            format = format.replace(RegExp.$1, RegExp.$1.length == 1 ? n : ("00" + n).substr(("" + n).length));  
    }  
    return format;  
};