Beregning af ugenummer
Hej eksperter,jeg er i gang med at lave en kalender i javascript, og fandt nedenstående script til at beregne ugenummeret, men det returnerer ugenummer 53 som den sidste uge i år, men det er forkert.
Nogen der kan tage et hurtigt kig på koden og sige hvorfor?
Mvh.
Mireigi
[ CODE BEGINS ]
Date.prototype.getWeek = function (dowOffset) {
/*getWeek() was developed by Nick Baicoianu at MeanFreePath: http://www.meanfreepath.com */
dowOffset = typeof(dowOffset) == 'int' ? dowOffset : 0; //default dowOffset to zero
var newYear = new Date(this.getFullYear(),0,1);
var day = newYear.getDay() - dowOffset; //the day of week the year begins on
day = (day >= 0 ? day : day + 7);
var daynum = Math.floor((this.getTime() - newYear.getTime() - (this.getTimezoneOffset()-newYear.getTimezoneOffset())*60000)/86400000) + 1;
var weeknum;
//if the year starts before the middle of a week
if(day < 4)
{
weeknum = Math.floor((daynum+day-1)/7) + 1;
if(weeknum > 52)
{
nYear = new Date(this.getFullYear() + 1,0,1);
nday = nYear.getDay() - dowOffset;
nday = nday >= 0 ? nday : nday + 7;
/*if the next year starts before the middle of
the week, it is week #1 of that year*/
weeknum = nday < 4 ? 1 : 53;
}
}
else
{
weeknum = Math.floor((daynum+day-1)/7);
}
return weeknum;
};
[ CODE ENDS]
