javascript 时间格式方法

 

 

 

//时间格式设置

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;

}

 

//用法  

var d = new Date();

d.format("h");

 

//判断时间

 

function convertdate(strdate) {

strdate = strdate.replace(/-/ig,'/');

var d = new Date(strdate);

var now = new Date();

var result;

 

if (d.getYear() == now.getYear() && d.getMonth() == now.getMonth()) {

var xday = now.getDate() - d.getDate();

 

switch (xday) {

case 0:

result = "今天 " + d.format("hh") + ":" + d.format("mm") + ":" + d.format("ss");

break;

case 1:

result = "昨天 " + d.format("hh") + ":" + d.format("mm") + ":" + d.format("ss");

break;

case 2:

result = "前天 " + d.format("hh") + ":" + d.format("mm") + ":" + d.format("ss");

break;

default:

result = d.format("yyyy-MM-dd hh:mm");

break;

}

} else {

result = d.format("yyyy-MM-dd hh:mm");

}

return result;

}