javascript:时间格式化

 Date.prototype.format = function(fmt) {

    var o = {

        "M+": this.getMonth() + 1,

        //月份

        "d+": this.getDate(),

        //日

        "h+": this.getHours() % 12 == 0 ? 12 : this.getHours() % 12,

        //小时

        "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

    };

    var week = {

        "0": "\u65e5",

        "1": "\u4e00",

        "2": "\u4e8c",

        "3": "\u4e09",

        "4": "\u56db",

        "5": "\u4e94",

        "6": "\u516d"

    };

    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, ((RegExp.$1.length > 1) ? (RegExp.$1.length > 2 ? "\u661f\u671f": "\u5468") : "") + 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;

}

//test

//alert((new Date()).format("yyyy-MM-dd EEE hh:mm:ss"));