利用JAVA SCRIPT來格式化日期

<script language="JavaScript">
<!--
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;
}

function rain()
{
obj1 = new Date().format("yyyy-MM-dd hh:mm:ss");
obj2 = new Date().format("yyyy-MM-dd");
obj3 = new Date().format("yyyy/MM/dd");
obj4 = new Date().format("MM/dd/yyyy");

alert("obj1="+obj1+ "\n obj2="+obj2 + "\n
obj3=" +obj3+ "\n obj4=" +obj4);
}
//-->

</script>
<input onclick="rain()" type="button" value="test" />