javascript获取当前日期所属第几周函数，具体代码如下：

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//获取当前日期在当前年第几周函数封装，例如2013-08-15 是当前年的第32周

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function theWeek() {

var totalDays = 0;

now = new Date();

years = now.getYear()

if (years < 1000)

years += 1900

var days = new Array(12);

days[0] = 31;

days[2] = 31;

days[3] = 30;

days[4] = 31;

days[5] = 30;

days[6] = 31;

days[7] = 31;

days[8] = 30;

days[9] = 31;

days[10] = 30;

days[11] = 31;

//判断是否为闰年，针对2月的天数进行计算

if (Math.round(now.getYear() / 4) == now.getYear() / 4) {

days[1] = 29

} else {

days[1] = 28

}

if (now.getMonth() == 0) {

totalDays = totalDays + now.getDate();

} else {

var curMonth = now.getMonth();

for (var count = 1; count <= curMonth; count++) {

totalDays = totalDays + days[count - 1];

}

totalDays = totalDays + now.getDate();

}

//得到第几周

var week = Math.round(totalDays / 7);

return week;

}

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