日期格式化

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;

}