如何计算某年某月的天数和每天对应的星期

Question

有关日历，请看：
http://go.163.com/colorweb/js/mengxhselectdate.htm

Answer 1

关于《时间与日期》免费 JavaScript 脚本:
http://www.1stscript.com/javascript/subindex.php?category=date&pagenum=1&type=

Answer 2

以处代码从qiushuiwuhen(秋水无恨),weidegong(weidegong)处来:
如果你能用得上的话，要谢请谢他们！<select id=year onchange=toDay()>
<option value=2000>2000</option>
<option value=2001>2001</option>
<option value=2002>2002</option>
</select>
<select id=month onchange=toDay()>
<option value=0>1</option>
<option value=1>2</option>
<option value=2>3</option>
<option value=3>4</option>
<option value=4>5</option>
<option value=5>6</option>
<option value=6>7</option>
<option value=7>8</option>
<option value=8>9</option>
<option value=9>10</option>
<option value=10>11</option>
<option value=11>12</option>
</select>
<select id=day onchange=toWeekDay()></select>
<input name=weekday>
<script>
function toDay(){
vYear=parseInt(document.all.year.options[document.all.year.selectedIndex].value)
vMonth=parseInt(document.all.month.options[document.all.month.selectedIndex].value)
day.length=0;
while((d=new Date(vYear,vMonth,day.length+1)).getMonth()==vMonth){day.options[day.length++].value=day.length;day.options[day.length-1].text=day.length;}
toWeekDay();
}function toWeekDay(){
try{
vDay=parseInt(document.all.day.options[document.all.day.selectedIndex].value)
var tmp=new Date(vYear+"/"+(vMonth+1)+"/"+vDay);
document.all("weekday").value=showweek(tmp);
}catch(e){alert(e)}}function showweek(now) {if (now.getDay() == 0) return ("星期日")if (now.getDay() == 1) return ("星期一")if (now.getDay() == 2) return ("星期二")if (now.getDay() == 3) return ("星期三")if (now.getDay() == 4) return ("星期四")if (now.getDay() == 5) return ("星期五")if (now.getDay() == 6) return ("星期六")}
window.onload=toDay
</script>

Answer 3

http://msdn.microsoft.com/library/default.asp?url=/workshop/author/behaviors/library/behaviorslibrary.asp

Answer 4

var n = new Date();
n.setYear(2002);
n.setMonth(3);
n.setDate(30);  //这里记不清了alert(n.getDay());