显示星期中包含的日期数
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<script>
var now = new Date();
var month = now.getMonth();
var date = now.getDate();
var day = now.getDay();
var year = now.getYear();
var m = new Array("一月","二月","三月","四月","五月","六月","七月","八月","九月","十月","十一月","十二月");
var d = new Array("星期日","星期一","星期二","星期三","星期四","星期五","星期六");
if (year < 2000) year = year + 1900;
var monarr = new Array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
if (((year % 4 == 0) && (year % 100 != 0)) || (year % 400 == 0)) monarr[1] = "29";
var sDate = date;
while (sDate != 1){
sDate = sDate - 1;
sDay = day - 1;
if (sDay < 0) sDay = sDay + 7;
}
var weekday = 0;
while (sDate != monarr[month]){
sDate = sDate + 1;
day = day + 1;
if (day > 6) day = 7 - day;
if (d[day] == "星期三") weekday = weekday + 1;
}
if (d[sDay] == "星期三") weekday = weekday + 1;
document.write (m[month] + "份有" + weekday + "个" + d[3]);
</script>
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