请看如下代码!请高手修改一下!谢谢啊!怎么计算结果不对啊?
<html>
<head>
<script>
var yearsday=0,monthsday=0,zdays=0,year,day,month,m=0;
var year=parseInt(prompt("请输入年份"));
var month=parseInt(prompt("请输入月份"));
var day=parseInt(prompt("请输入天数"));/*************************************************/ for(;year<2010;year++)
{
if(year%4==0&&year%100!=0||year%400==0)
{
day=366;
}
else
{
day=365;
}
yearsday=yearsday+day;
}/*************************************************/
for(;m!=month;m++)
{
switch(month)
{
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12:days=31; break; case 4:
case 6:
case 9:
case 11:days=30; break;
/*************************************************/
case 2:
if(year%4==0&&year%100!=0||year%400==0)
{days=29;}
else{days=28;}default:alert("请输入正确月份");break;
}
/*************************************************/
monthsday=monthsday+days;}
zdays=yearsday+monthsday+day;
alert(zdays);
</script>
</head>
</html>
<html>
<head>
<script>
var yearsday=0,monthsday=0,zdays=0,year,day,month,m=0;
var year=parseInt(prompt("请输入年份"));
var month=parseInt(prompt("请输入月份"));
var day=parseInt(prompt("请输入天数"));/*************************************************/ for(;year<2010;year++)
{
if(year%4==0&&year%100!=0||year%400==0)
{
day=366;
}
else
{
day=365;
}
yearsday=yearsday+day;
}/*************************************************/
for(;m!=month;m++)
{
switch(month)
{
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12:days=31; break; case 4:
case 6:
case 9:
case 11:days=30; break;
/*************************************************/
case 2:
if(year%4==0&&year%100!=0||year%400==0)
{days=29;}
else{days=28;}default:alert("请输入正确月份");break;
}
/*************************************************/
monthsday=monthsday+days;}
zdays=yearsday+monthsday+day;
alert(zdays);
</script>
</head>
</html>
<html>
<head>
<script>
var yearsday=0,monthsday=0,zdays=0,year,day,month,m=0;
var year=parseInt(prompt("请输入年份"));
var month=parseInt(prompt("请输入月份"));
var day=parseInt(prompt("请输入天数"));
var td = new Date();
var bd = new Date(year,month-1,day);
var dif = td - bd;
var days = Math.ceil(dif / (24 * 60 *60 * 1000))
alert(days)</script>
</head>
</html>
var yearsday=0,monthsday=0,zdays=0,year,day,month,m=0;
var year=parseInt(prompt("请输入年份"));
var month=parseInt(prompt("请输入月份"));
var date=parseInt(prompt("请输入天数"));/*************************************************/ for(;year<2010;year++)
{
if(year%4==0&&year%100!=0||year%400==0)
{
day=366;
}
else
{
day=365;
}
yearsday=yearsday+day;
}/*************************************************/for(var m=1;m<month;m++)//月份从1月份算起,算到输入的前一个月
{
switch(m)//要判断m啊,判断month做什么??大哥
{
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12:days=31; break;
case 4:
case 6:
case 9:
case 11:days=30; break;
/*************************************************/
case 2:
if(year%4==0&&year%100!=0||year%400==0)
{days=29;}
else
{days=28;} break;//加个这个
default:alert("请输入正确月份");
break;
}
/*************************************************/
monthsday = monthsday+days;
}
zdays=yearsday-(monthsday+date);//因为循环算年数的时候已经将所有天数的算上了,所以要减去出生那年你没有活的日子
alert(zdays);