转自：http://blog.csdn.net/xiaojian0819/article/details/5688996

Date.prototype.format = function(format){ var o = { "M+" : this.getMonth()+1, //month "d+" : this.getDate(),    //day "h+" : this.getHours(),   //hour "m+" : this.getMinutes(), //minute "s+" : this.getSeconds(), //second "q+" : Math.floor((this.getMonth()+3)/3),  //quarter "S" : this.getMilliseconds() //millisecond } if(/(y+)/.test(format)) format=format.replace(RegExp.$1, (this.getFullYear()+"").substr(4 - RegExp.$1.length)); for(var k in o)if(new RegExp("("+ k +")").test(format)) format = format.replace(RegExp.$1, RegExp.$1.length==1 ? o[k] : ("00"+ o[k]).substr((""+ o[k]).length)); return format;}

 

对Date的原型进行了改造，用起来比较方便

var d1 = new Date();d1.format('yyyy-MM-dd');var d2 = new Date();d2.format('yyyy-MM-dd');