JavaScript 格式化时间日期 - HelloWorld开发者社区

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
 <HEAD>
<TITLE> Format Date </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
<mce:script type="text/javascript"><!--
/** 
* 时间对象的格式化; 
*/  
Date.prototype.format = function(format) {  
/* 
* eg:format="yyyy-MM-dd hh:mm:ss"; 
*/  
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 testDate(){//测试
var testDate = new Date();
alert(testDate.format("yyyy-MM-dd hh:mm:ss"));//yyyy 一定得是小写
alert(testDate.format("yyyy年MM月dd日hh小时mm分ss秒"));
alert(testDate.format("yyyy年MM月dd日"));
alert(testDate.format("MM/dd/yyyy"));
alert(testDate.format("yyyyMMdd"));
alert(testDate.format("hh:mm:ss"));
}
// --></mce:script>
</HEAD>
 <BODY>
<input type="button" onclick="testDate();" value="testDate"/><!-- 测试按钮 -->
 </BODY>
</HTML>

原文来自： http://lovely.javaeye.com/blog/507798 本人经过实践 , 发了个比较全的代码上来