javascript 获取某一日期属于一年中那一周及这周开始和结束日期
多也不说了，直接贴代码，代码是经过测试没发现问题！
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<script type="text/javascript">
function weekofday(data) {//判断某一日属于这一年的第几周
debugger;
var dt = new Date(data)
var y = dt.getFullYear()
var start = "1/1/" + y
start = new Date(start)
starts = start.valueOf()
startweek = start.getDay()
dtweek = dt.getDay()
var days = Math.round((dt.valueOf() - start.valueOf()) / (24 * 60 * 60 * 1000)) - (7 - startweek) - dt.getDay() - 1
days = Math.floor(days / 7)
return (days + 2);
}
function show() {
var time="2010-04-28";
oToday = new Date(time);
currentDay = oToday.getDay();
if (currentDay == 0) { currentDay = 7 }
mondayTime = oToday.getTime() - (currentDay - 1) * 24 * 60 * 60 * 1000;
sundayTime = oToday.getTime() + (7 - currentDay) * 24 * 60 * 60 * 1000;
alert(weekofday(time));
alert("今天是" + oToday.getDate() + "号，星期" + currentDay + "\r");
alert("周一是" + new Date(mondayTime).getDate() + "号，周日是" + new Date(sundayTime).getDate() + "号")
alert("周一 " + new Date(mondayTime).toLocaleDateString() + "\n周末 " + new Date(sundayTime).toLocaleDateString() + " " + new Date(mondayTime).toLocaleTimeString())
}
</script>
</head>
<body>
<input name="Submit" type="image" value="提交" onclick="show()" src="http://images.cnblogs.com/pass/pass_01.gif" align="absmiddle" />
</body>
</html>
