方法一：

Date.prototype.format = function (format) {           var args = {               "M+": this.getMonth() + 1,               "d+": this.getDate(),               "h+": this.getHours(),               "m+": this.getMinutes(),               "s+": this.getSeconds(),               "q+": Math.floor((this.getMonth() + 3) / 3),  //quarter               "S": this.getMilliseconds()           };           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;       };调用方法alert(new Date().format("yyyy-MM-dd hh:mm:ss:S"));alert(new Date().format("yyyy-MM-dd hh:mm:ss"));

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方法二：

function getNowFormatDate() {    var date = new Date();    var seperator1 = "-";    var seperator2 = ":";    var month = date.getMonth() + 1;    var strDate = date.getDate();    if (month >= 1 && month <= 9) {        month = "0" + month;    }    if (strDate >= 0 && strDate <= 9) {        strDate = "0" + strDate;    }    var currentdate = date.getYear() + seperator1 + month + seperator1 + strDate            + " " + date.getHours() + seperator2 + date.getMinutes()            + seperator2 + date.getSeconds();    return currentdate;}

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方法三：

function curDateTime(){var d = new Date(); var year = d.getYear(); var month = d.getMonth()+1; var date = d.getDate(); var day = d.getDay(); var hours = d.getHours(); var minutes = d.getMinutes(); var seconds = d.getSeconds(); var ms = d.getMilliseconds(); var curDateTime= year;if(month>9)curDateTime = curDateTime +"-"+month;elsecurDateTime = curDateTime +"-0"+month;if(date>9)curDateTime = curDateTime +"-"+date;elsecurDateTime = curDateTime +"-0"+date;if(hours>9)curDateTime = curDateTime +""+hours;elsecurDateTime = curDateTime +"0"+hours;if(minutes>9)curDateTime = curDateTime +":"+minutes;elsecurDateTime = curDateTime +":0"+minutes;if(seconds>9)curDateTime = curDateTime +":"+seconds;elsecurDateTime = curDateTime +":0"+seconds;return curDateTime; }alert(curDateTime());