javascript将日期转换为中文

function CNDateString(date)
{
var cn = ["〇","一","二","三","四","五","六","七","八","九"];
var s = [];
var YY = date.getFullYear().toString();
for (var i=0; i<YY.length; i++)
if (cn[YY.charAt(i)])
s.push(cn[YY.charAt(i)]);
else
s.push(YY.charAt(i));
s.push("年");
var MM = date.getMonth();
if (MM<10)
s.push(cn[MM]);
else if (MM<20)
s.push("十" + cn[MM% 10]);
s.push("月");
var DD = date.getDate();
if (DD<10)
s.push(cn[DD]);
else if (DD<20)
s.push("十" + cn[DD% 10]);
else
s.push("二十" + cn[DD% 10]);
s.push("日");
return s.join('');
}
alert(CNDateString(new Date()));