js时间格式

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;

}