利用JS实现时间格式转化

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;

}

调用：

var time=new Date(d.regday);

var nowtime=time.format("yyyy-MM-dd")