<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title> New Document </title>
<meta name="Generator" content="EditPlus">
<meta name="Author" content="">
<meta name="Keywords" content="">
<meta name="Description" content="">
</head>
<body>
<script type="text/javascript">
<!--
function m_DaysInMonth(pYear,pMonth){
var nDays = 30;
if(pMonth==2){ //2月单独处理
if(m_IsLeap(pYear)) nDays = 29;
else nDays = 28;
}
else if(mInList(pMonth,"1,3,5,7,8,10,12")){
nDays = 31;
}
return nDays;
}
//判断某年是否是闰年
function m_IsLeap(pYear){
if(pYear % 400 == 0){
return true;
}
else if((pYear % 100 != 0) && (pYear % 4 == 0)){
return true;
}
return false;
}
//判断是否在字符串列表里：
// if(mInList("3","1,3,5,7,8,10,12")){ //true
// if(mInList("2","1,3,5,7,8,10,12")){ //false
function mInList(s1,slist){
var ss1=","+s1+",";
var ss2=","+slist+",";
ss1 = ss1.toLowerCase();
ss2 = ss2.toLowerCase();
return ss2.indexOf(ss1)!=-1;
}
alert(m_DaysInMonth(2011,2));
//-->
</script>
</body>
</html>