扩展JSDate对象时间格式化功能的小例子_javascript技巧

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;
};